One big thing I didn't see mentioned (maybe I just missed it) is to STAY RELAXED! When your hand is free from tention, you naturally keep your fingers closer to the fret board and move more efficiantly. From my experience, efficiant movement is not something that you can "force" yourself to learn. You just have to develop it. And the best (and probably the only) way to develop it is practice.
So far, we've all talked about the left hand (or right hand for lefty's). What about the right hand?