Greene's low turnovers and low foul numbers indicate a player that is very risk-averse. Normally I'd say that's a good thing, but he takes it to the extreme. He needs to use his athleticism to his advantage. Be more physical on D, and drive to the hoop.
For all the crap we give Phil, he's shooting much better from behind the arc, and has a very impressive mid-range game of floaters and pull-ups. Use them!