Tell your family and friends that you are not going to smoke at all. Set a quit date.
If these aids do not work try these:
Whenever you start craving, distract yourself in something- some delicious food or a drink or any physical activity.
Go online, read forums or any quitter's bold and encourage for quitting smoking. This way you will also get ideas that will help you in quitting smoke.
Keep reminding yourself about the bad effects of smoking and benefits of not smoking.
Avoid company of people who smoke and places surrounded by smokers.
Indulging in a daily physical activity like jogging, gymming might also help a great deal.
Good Luck!