My pocket knife is a two bladed Victorinox with straight and phillips screwdriver, awl, etc. It's nothing grand, but it is very useful for opening boxes, tightening the more than occasional loose screw, picking the remnants of lunch from my teeth, opening the infrequent can when the real can opener is no where to be found, and the tweezer was invaluable in removing a lunched schrader valve when a slashed tire had to be replaced.

A wonderful tool, that Swiss Army Knife.