-increase your vert
-work on foot work
-practise, practise, practise
-jump and reach as high as you can
-focus on puting the ball in
-you just want to just put it in, after a while when you feel more confident you can start
slaming it hard putting in more power.
-thats how you dunk a basketball.
http://www.youtube.com/watch?v=rmGb_noezZQ&NR=1
