Practice, practice, practice! Do a lot of ball handling drills.
I've got a much older cousin from philly that said he taught all sorts of people how to play basketball, even Matt Ryan (the quaterback for the Alanta Falcons), who he says is better at basketball than football. Even though I only play basketball for fun he was telling me a simble drill I could do to improve my handles. He grabbed five chairs and put about 3 feet of space through each of them. He told me to only use one hand to dribble and to run around the chairs about ten times and then switch hands. It's a good drill because it teaches you how to use both hands and you learn how the ball bounces. Remember, unless you really need to, don't look at the ball as you dribble.
Do a lot of ball handling drills.
practice :)
