Other things that you can use to put in your mouth include toothpicks, plastic straws, gum, and hard candy. Think about when you normally smoke and decide what you'll do instead. For instance, if you always have a cigarette with your coffee, plan to have something else on hand. If you find that the nonsmoking causes you to want to eat more at meals, drink a glass of water before and during the meal. Chew your food well, eat slowly, and concentrate on how much better food tastes now.
Nicotine addiction can be monumentally difficult to overcome.
Whatever your reasons for wanting to quit, know that there are many source of assistance. The American Cancer Society has lots of good information and helpful pamphlets for people who wish to quit smoking, and they will be happy to answer your questions and send you this information. The American Lung Association also has an excellent program and very good materials.