I quit smoking tobacco. The trick is linking in your mind more pleasure to NOT smoking cigarettes, and linking MASSIVE amounts of pain to smoking cigarettes.
Once I made that correlation in my mind, I never again smoked a tobacco cigarette. Not once since 1997.
Also, here is a good way to stop smoking,
www.air-2.com it is a vaporizer, where you can load tobacco or any herb... and get only the good essense from the plant. Many people are using it as an alternative to smoking cigs.
The fire from the cig, and the heat really bugged me. The fact that I am burning all these toxins and having them go in my lungs and body, bothered me. My g-ma died of lung C... and I linked that to the experience. Plus that stanky clothes, car and fingers from smoking.
I felt so much better when I stopped smoking. Very pleasureable and rewarding to have quit.