When working on a car, I hate trying to keep track of all the nuts, bolts and screws that come off. I used to work aircraft maintenance with the Air Force and we had these parts bags in different sizes. The bags were drawstring and had a big piece of paper attached to the bottom seam that you could write on (how many screws are in the bag, what it came off of, and when). You could use the drawstring to tie the bag to the part you just removed.

I know there has to be a civilian version, if not the same thing, out there, but I can't find it. Does anyone know where I might find these bags?