I have a file marked "Action Figures." In that file are several more, most notably "G.I.*JOE," "Cobra," Oktober Guard," and "Zartan and the Dreadnoks."
Open one of these files and there are two more files, "Figures" and "Vehicles and Battle Stations."
Open one of these and each character or vehicle series has their own file.
Within each individual file, I have a blank white background picture of the a figure or vehicle with all the accessories. Each character's figure share the same file, I have eight various Cobra Commanders, so they are all in the same file, in order from version one on up. I use these files to keep track of the photos I've taken of each figure or vehicle too. Pictures that include several characters or vehicles go into another file.
I also have a file named "All Action Figures." In this file I have, you guessed it, a picture of every figure I've got. For troop builders I just use copy after copy of the same photo rather a pic of each individual figure. This lets me know how many figures of a given troop builder I've got, so I know if I need to get anymore to build that figure's ranks more to make a good sized platoon or squad. I also have a file named "All Vehicles" that is set up the same way.
I actually started this file for a very dire reason, as a few years ago things in my life were not going well and let's just say I wasn't sure how much longer I was going to be around. I made the file for my family so that if they followed certain instructions, they could send the file to ZombieGuide and he'd have a good idea of what he might be getting and could make a somewhat educated guess as to what to offer. Fortunately that period in my life has long passed, but the way of keeping the collection and photos organized like that has stuck with me and it works well for me.
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Some people, when trying to avoid thinking about those things that cause them pain, turn to drink, food, or drugs...I turn not to any of those...I collect action figures. Over the years, I've found that alcoholism is much more socially acceptable by far.