Honestly for me the handiest pocket knife is a Victorinox SAK or some sort. I like ones with the saw blade and an awl.
I've got one with a saw blade, awl, can opener, bottle opener, two sizes of flat screwdrivers, a phillips head driver, tooth pick, tweezers and knife blade but it's a big, fat bastard and more than I want in my pocket on a daily basis.
