As compulsive as it may sound, awhile ago I began cataloging all the stuff I have on an Excel spreadsheet. Not a tremendous amount of it is NOS, but a lot of it is in really good condition. Being an apartment-dweller, everything is packed away in file boxes, so I forget about stuff I have on hand (and buy duplicates) if I don't look it up first, to remember -- Oh yeah, got one of those already! So when I kick the bucket, it will be easy enough to figure out what's there, at least.