Every once in awhile, I throw away something by mistake and have to do a little digging in the trash to retrieve it. I get skittish, though, because I never know if I'm going to plunge my hand onto something sharp. To prevent this potential hazard, I keep a small medicine bottle on my workbench in which I accumulate used utility knife blades, razor blades, and other sharp waste products. When the bottle is filled, I cap it and discard it.—Stanley Krasovic, Honesdale, Pa.