I guess I was right...Stress is the reason why I tend to smoke.I don't smoke when I'm not stressed. For the past month, I've passed out smoking already. So far so good. I'm taking a supplement called Cortitrol. It's an anti-stress formula. It works for me since I don't smoke now. Even the urge isn't there any more. I hope this could help to people who want to stop smoking. :D