Smoking is a habit and if you want to quit smoking then you have to break the habit. The other day I was listening to a lecture and the person said that there was no such a thing as an addiction, just habits. She said that anything repeated on a regular basis is a habit.
When you think about it smoking cigarettes is a habit. Every time you smoke a cigarette you reinforce the habit. If you take the time out to look at when you smoke you will find that there are certain things that trigger the urge to smoke.