I thought I mentioned this, but I guess I inadvertently edited it out.
Lately, I've been packing my games and systems tight using
old file boxes and file shelves I picked up. I've tagged the boxes and made entries in a database. About a 3/4 of my console collection and about half of my arcade parts (mostly recent acquires) are stored this way. But that system is imperfect. Bulky items like the guitar hero controller or systems like the Sega Genesis/CD don't fit well, if at all, into these boxes.
I have a source for old, unwanted, file boxes and I've been chopping them up to make custom boxes as well. Namely for PCB's and Marquees that I don't want damaged while I'm trying to store them.
Storing them this way works out pretty well. I get a lot of consistency in storing things and my store room (if I ever get around to picking all the crap up off the floor) will be nice and neat.