FRETS.COM
Shop Tip #187
© Frank Ford 2006; Photo by FF

OK, you have your wood scrap bin on wheels so it can be useful around the shop, and you clean it out from time to time so there's only good stuff in there.  Now, finish the job by tossing an old sheet over the top so you won't accidentally drop a small part down in there and have to unload everything to find it.