Strength shoes do work well. I also found success running up hills backwards, like a defensive back. Watch out for the weights on your body, been known to hurt the knees and joints. Abs are also a huge part of jumping. However, the most important thing is to jump everyday, numerous times. Despite all of this, if your only 5-10 and you can't dunk on the regular, I wouldn't trip off of it to much, it's only going to take away from your other game. Chances are you will probably never dunk on anybody in a game so who really cares. On the other hand I remember working my ass off to get some fucking hops. I wanted to jump high bad, mostly because it was a status thing. I'm six feet tall and have dunked twice. Remember that there are plenty of cats who trip off hops and not to many that trip off the other details of the game. Soon you will realize that kids who trip off hops are not that hard to beat, but I do feel you. Good luck with the season, and if you really, really, want it, you can get it.