Begin by making sure you are in the best overall shape you can be. This includes all other body parts as well as your legs. In order to reach your ultimate jumping potential, you need to be in good overall shape. You use your entire body while performing a jump, so it only makes sense that your entire body should be in shape. While this is not the most glamorous part of the process, it needs to be done. A solid foundation is needed in order to see the best results. Begin with this and you will be rewarded for your efforts. If you want to jump higher, started to this one first.