Self Help
If possible, have a friend quit smoking with you.
Change your smoking routine by smoking in a different place, use your other hand, don't do anything else while you are smoking.
Notice when and why you smoke paying attention to the other daily things you do while smoking like driving or drinking coffee.
Smoke only in a certain place, such as outside.
When you want a cigarette, wait a few minutes.
When you get the urge, chew gum, brush your teeth or drink a glass of water.
Buy only 1 pack of cigarettes at a time.
Reward yourself at the end of the day for not smoking.