As far as aiming goes, and I think this works for any shot (including putting), here is a simple tip that often goes overlooked. I was watching School of Golf with Martin Hall on the Golf Channel the other day, and he says that most amateurs get their feet, shoulders, and body into position, THEN align the clubface. He said to see a dramatic improvement in your aim, do what the pros do (and I have seen them do this on TV...A LOT!). Step up to the ball, aim your clubface FIRST, then set your body into alignment. I hope this will help you out!
P.S. He also said something that sounds very true to me, and has stuck with me..."We can't all hit or swing like the pro's do, but there's no reason we can't setup and address the ball like a pro!"