Hey.There's plyometrics that you can do,their specifically for explosivness.
A couple links-
There's 3 articles on there about what it is,and upper body and lower body explosivness.
If you have a facebook I also recommend adding Adam Linkenauger because he can help you anything vertical
jump which includes explosivness.Here's a link to his blog:
Hope this helps.
hey man. I am about ur height (5'4) and i had the same problem last year. I bought a bunch of DVD's that helped my game out and one of them hand a drill that completely helped my explosiveness. You use a tennis ball and a basketball (You can use a partner, but you can do it by yourself). Dribble the ball in one hand and have the tennis ball in the other. Drop the tennis ball maybe a footaway from yourself and let it bounce once. Before it bounces again, quickly crossover to the other hand and pick the tennis ball out of the air with your free hand (Make sure the ball is actually far enough so that you have to move to catch it). This is simulating you quickly crossing over and protecting the ball from the defenders hand. If your doing this drill the right way, it helps you be more explosive and helps your crossover get quicker. If you have any questions, just reply back to this. hope i could help