The way that I did it in 2K11 and 12 was:
1. I gave the ball to my team mates a lot to get a better grade and be a team player.
2. I also watched a lot of Chris Smoove: http://www.youtube.com/user/Smoove7182954?feature=watch
Those are the two things that I did to originally improve myself, then once I got better I just continually practiced certain plays, and doing drills.