I know pretty much everything that's in my stash without any kind of list. I don't obsess about organizing fabric. Anything I didn't buy as a full bolt is in 26-qt clear bins by color (prints, solids and batiks separately), and it never takes me more than a few minutes to find exactly what I'm looking for. I have no idea how, but if I see a fabric, I know immediately whether or not I already have it.