What keeps me sane, aside from baggies full of bolts- are those magnetic trays. I hang them upside-down when I'm under the car and under the hood. Harbor Freight is the best place for them, since they are so cheap. A 4" bowl is like $3. I do like the cupcake cup idea, however.
http://www.harborfreight.com/cpi/cta...emnumber=90566
