My methods have changed over the years and depend completed upon when I started the army. They started with me buying sort of anything and everything, and have ended up with me planning squads right down to the individual model.
Ultramarines - My first army alongside my Tyranids, my Marine army started with just whatever I could afford as a small boy oh so many years ago. A Tactical squad here, some Terminators, some Heavy Weapons, it was all very haphazard. When I got back into
40K mid-way through 3rd Ed I was obviously older so I took it a bit more seriously and began buying the things I needed, I got some more vehicles, completed all the squads I had to make up a full Company of Marines, standardised and improved units so they weren't so random, and generally made things better over all. I then moved into the phase where I went and got lots of things to make up complete forces, so enough Scouts to do a bunch of different Scout units at once, ensuring that I can do several Terminator units of the new models and old models, increasing the amount of Special and Heavy weapons, having lots of redundant Sergeant and
IC's so I could swap between lots of different weapon types. It was still done in small bits, rather than big lumps (except the Scouts which I got all at once), but it's an army now rather than a collection of models that I use in every game because that's all I own.
Tyranids - When I started playing Tyranids only 3 model kits existed for them; Tyranid Warriors, Genestealers and Carnifexes. Termagants were in metal and hard to find, and I had no interest in the also-hard-to-get Genestealer Hybrid figures. So, as you might imagine, the Tyranid army was a slow starter, with a whopping 9 Tyranid Warriors, 8 Genestealers and a single Carnifex to its name. When Tyranids finally got the full treatment in 2nd Ed I expanded with Lictors, H-Gaunts, T-Gants, Hive Tyrants, another Carnifex and Gargoyles, making a complete army. Most of that was done in a single go, with me saving up AUD$300 (a big deal at the time) to buy the Tyranid Army Box. I missed the 3rd Ed Tyranid re-release, but expanded upon the army when they were re-re-released again in 4th, getting 3 Battle Forces, a stack of Raveners and Tyranid Warriors, more Gaunts than you can shake a stick at (14 boxes!!!), an extra three Carnifexes, Tyrant Guard, more Hive Tyrants, Zoanthropes and so on. I even managed to get the Tyranid Army Box for about 2/3rds the price after haggling the
GW store for it (they had had it in stock for well over a year by this stage and wanted to get rid of it, and actually offered a discount!!!). Since then I've gone and only bought what I needed to complete units, so a few more of the old 2nd Ed metal Tyranid Warriors, and some extra Gaunts.
Guard - I started a Guard army the day the Leman Russ was released. It was the first new tank in
40K since the Predator, so it was a big deal for someone who loved tanks and started
40K because I like sci-fi tanks. Pretty soon after the Russ came out
GW started the project that would eventually lead to the first Codex: Imperial Guard. Each month they released a new type of Guardsmen - Catachan Jungle Fighters, Atillan Rough Riders, Cadian Shock Troops, Valhallan Ice Warriors, Mordian Iron Warriors, Tallarn Desert Raiders (and somewhere in that was the Chimera). I told myself I'd wait until all of them were out until I decided which ones I liked, and settled on the Cadians. Got myself two whole squads of Cadians and a Command Section, and then later a Tallarn Command Section and Squad and a Mordian Command Section and Squad, plus a Demolisher and a Basilisk!!! And that was my army. When I got back into
40K I decided that the Guard needed to be re-tooled into a proper fighting force. An army of 4 squads wasn't going to cut it, especially not in 3rd Ed where everything was cheaper (points wise) therefore you needed more models to make up a complete force. Plastic Cadians didn't exist yet, so I worked on expanding my Cadians and Mordians, getting myself up to three small platoons. I got a few more tanks, a second Russ, another Basilisk and Demolisher, a Hellhound and eventually 8 Chimeras. The plastic Cadians arrived a little while later and I just started buying heaps of them - the Army Box, Battleforce, and more and more and more and more and MORE tanks. I started buying Forge World items, including several Super-Heavies, and next thing you know I have 6 45-man platoons (two of them fully mechanised), 3 10-tank Armoured Companies, 1 10-tank Artillery Company, 1 10-tank Super Heavy Regiment, 2 10-walker Sentinel Companies and numerous other items. Guard are easily my fav army, and I'll probably keep adding to them as time goes on.
Chaos - Chaos got me back into
40K. When their second 3rd Ed Codex was released I jumped right back into
40K, bought the army box, and started my Chaos army up again. I had started when the 2nd Ed Codex was released, and ended up with a Chaos army that was all Terminators, Plague Marines, Berzerkers and Special Characters. I had a Chaos Marine army with no actual Chaos Marines. Falling in love with the basic Chaos Marine kit, I bought a LOT of them. And I mean a lot. Next thing I knew I had more basic Chaos Marines than I had actual Ultramarines, and I had a company of them! Like with the Guard, these were big buys of several units at once, but done gradually as things took my fancy. The biggest single purchase was at the end of 2006, when I ordered AUD$1000 worth of Daemons in a single hit. I had no Daemons at that stage and I rectified that situation with several units of Bloodletters, Daemonettes, Seekers and Furies. My Chaos forces grew to the point where I had enough to do a large World Eater force separately to my main Chaos force, and my Chaos force could do Alpha Legion, Iron Warriors, Black Legion and Word Bearers, and usually two of those simultaneously depending on how I put it together. Eye of Terror came out and I got a Lost & The Damned army, buying enough conversion packs to do 90 mutants as soon as they came out. Best fun I've had with an army in ages. And then, coming full circle, Chaos is what killed my interest in mainstream
40K. The new 'Codex' removed everything I love about Chaos, made my $1000 worth of Daemons (more now, with the inclusion of additional Bloodletters, Daemonettes and several units of Plague Bearers) and made my carefully modular Chaos army redundant... and they took away my Lost & the Damned.
From hereon the way I got my armies changed. Rather than just guying lots of everything so I could field any unit in just about any config, and sometimes multiples of those as well, I went to make specific armies designed with an upper limit in mind that I would not go over, just little forces that interested me. I have four armies like this:
Inquisition - Borne of my Guard army, this just started with me wanting to get a few Servitors to rock around with my Enginseers and then deciding that I wanted a pair of Kyoto-Pattern Inquisitorial Fireteams (as they were called back in the day). This then moved to me wanting to get a few of the Henchmen... and then all of the Henchman models, mostly for Necromunda. By the time I was done I realised I had the beginnings of an army, so decided to sit down and think about what sort of army I wanted. I didn't want Sisters, and as much as I liked Grey Knights a friend in our group already had them. So what about a pure Inquisitorial army? I had loved the Kasrkin models since I first saw them, but never got any because I didn't want Stormies in my Guard army. But as Inquisitorial Storm Troopers? Well I need troops, don't want to induct allies and don't want anyone from the Chambers Militant, so Inquisitorial Storm Troopers it was. I got 6 full squads. Now my eventual aim was to have these as an AirCav army, mounted in Valks. I had gone to buy Valks several times but had always been turned away by the cost and the thought of
FW-Grade warped and miscast models. So I held off, instead turning my efforts to making sure I had more of the rogue's gallery of other Inquisitorial units (Death Cult Assassins, Daemonhosts, Archo-Flagellants, etc.). And then, as luck would have it, several years later
GW goes and makes a plastic Valkyrie. I instantly bought 6 of them for my 6 Stormy Squads, and I'm looking forward to playing them for the first time.
Necrons - Our group has been working on a little endeavour called the Warhammer 40,000 Revisited Project for the better part of 6 years... since before 4th Ed came out actually. It started off as a simple revision to the Eldar Codex to make them playable in 3rd Ed, but span out to a full scale rules re-write. It's been a long and hard struggle, writing, re-writing and playtesting, but it has been worth it. It wasn't all happy sunshine and rainbows though, and there have been times where I've been sick of writing and playtesting rules. The biggest time was during a Marine Codex revision I was tired of the multiple complaints about things that I didn't want to change. I got so sick of the back and forth that I went on eBay and bought 8000 points of Necrons in two weeks. This was a release, buying something no one in the group had and giving me something else to focus on. It was planned out very carefully, with the army comprising of 4 'Wings', each wing with a Lord, minimum Troops and a Monolith at its core, and then each wing having a particular 'theme', so the first wing had more Warriors and two units of Immortals, the next one was full of Destroyers and Heavy Destroyers (and the Lord became a Destroyer Lord), the next wing was a
HTH wing, with Pariahs, Flayed Ones and Wraiths, and the final one a wing with Scarabs and Tomb Spyders. The Necron army also served as my first fully painted army, as I intended to use them to teach myself how to paint. Ironically, as the person with the most amount of models and armies in our group and the most amount of unpainted armies, at our last event I fielded a nearly completely painted Necron army, more painted than any of the armies I faced!!!
Death Guard - An offshoot to my Chaos army I decided that my dinky 14 Plague Bearers needed to be something more than random models I had bought when I was a small boy in awe of the massive 2nd Ed Chaos Codex. I wanted a Plague Marine
army. So I looked at what I had, what was available (metal Death Guard) and then saw that
FW had just released the Plague Marine conversion kits. I had a number of left-over Chaos Marines form my buying frenzy when the 'Chaos' Codex was re-released, so I had spare legs for the conversion kits. I didn't care that Death Guard didn't actually exist any more, I just wanted a Plague Marine army. So I planned out the army - 4 7-man Squads of Plague Marines, 2 7-man Plague Marine Havoc Squads, 3 7-man(!) Plague Bearer Squads, 1 7-man Plague Terminator Squad, plus a few characters, and both the
FW Death Guard Dreads, Rhinos to transport them, the Nurgle Daemon Prince and Great Unclean one. I then went out and bought everything in a single lot, and built them over the course of two weeks. This army is 'done'.
Deathwatch - Proving how strange I am, this army doesn't even exist in the rules! A mistake with
GW mail order years before had seen me end up with a stack of metal
DW shoulder pads and bolters, and then with the plastic Command Squad I got a few plastic
DW pads. Then I noticed that the Terminator kit came with a single Deathwatch Terminator shoulder pad, and an idea sprung into my head - I wanted a full army of Deathwatch Marines. So I planned out my force - one Command Squad, two Tactical Squads, 1 Assault Squad, 1 Devastator Squad, 1 Terminator Squad, 1 Terminator Assault Squad. I ordered various metal shoulder pads, got Black Templar sprues, a box of Dark Angels, bits ordered Deathwatch Terminator Shoulder pads from various sites (this was just as Bits & Kits
UK was starting, so a big thanks to them for helping me out, as well as the guys at the Wookiehole). I gathered the bits, decided that the army would be led by a Thunder-Hammer Wielding Ultramarine Captain, each of the squads would be led by an Imperial Fist (or successor - so I have an Imp Fist, Crim Fist and Black Templar Sergeant), the Assault Squad would be led by a Flesh Tearer (using the Berzerker Champion head), all the main Sergeants would have the Signum Backpack from the plastic
Devs, each squad would have a Dark Angel as its 'second in command', the Command Squad had a Blood Angel Apothecary, the two power weapon guys in the Assault Squad are both White Scars, the leader of the Assault Terminators is a Black Templar, and so on. Each model was made to be individual, so that no two Marines were the same (except the heavy weapons which, due to the nature of the plastics, only had room for the
DW shoulder pad and not any special chapter-specific pads). I love this army even though it doesn't exist.
My next and probably final army (until
GW or
FW does an Adeptus Mechanicus army that is) will be Crusading Marines, modelled on Black Templars without actually
being a Black Templar army. Like with my Deathwatch, I will plan each squad right down to the bitz being used, and although it will be bigger than the other 'boutique' armies I have, it will still have an upper limit and not be an endlessly increasing army like my main four armies. I will also do it much more slowly, both to avoid a huge backlog of models (I have a big overflowing box of shrink-wrapped models in my main game room which looks like a
GW stock order just arrived) and because I now have a huge amount of debt thanks to getting a home loan, so I can't afford to buy heaps and heaps and heaps. I'll still do massive orders in big blocks - as I've done the whole dribs and drabs thing and I hate it - but at a much slower pace and with larger gabs between each 'lot'.