When you are about to shoot the hook, be sure that your chest is perpendicular to your opponents. Doing so creates space with your shoulders between the ball and the defender. Shoot the shot high and with your wrist stopping at the ear on the side of your shooting hand. Keep both hands on the ball until it's time to shoot the ball. I always say use the backboard as a safety net. When you get an offensive rebound, the hook is a great way to put the shot back up quickly.