Hahaha. Practice, practice! And as Kintaro Oe also said, STUDY, STUDY!
Practice having a serious talk in front of a mirror. Go out and watch girls walk by without being sexually attracted. See with rational objective eyes a way to get what you want. In other words, PRACTICE self-control FOR GETTING A GIRL.
I know endorphines are crazy things, and masturbation releases endorphines to the brain. The intense stimulation and withdrawal from it makes you shake. It's normal. Just make a conscious effort to find a girl that can satisfy your sex addiction (yes, girls can also get addicted to sex, but they don't as much because it is less frequent for women to masturbate).