I have some big bins that everything goes into when I disassemble a car for a build. I also have some old plastic jugs that all the useable bolts and nuts go into. Sometimes I'm back digging into both during a build, or a future build. I'm always surprised when some leftover from a previous build turns out to be perfect for another build, with a little modification. I try to fix, or build whatever I can, rather than go out and purchase something new. I've got way more time than money, and spending hours to build a $40 part, is more rewarding, and frees up the money for neccessary purchases. Spent an hour Sat. building blankoff caps from scrap aluminum for my rear wheels, instead of paying $35 a pair for new.