Drink lots of cold water. It will refresh you as it helps clear your body of nicotine. Start a money jar with the money you save by not buying cigarettes. Seeing the money you're saving add up is very motivating. If you slip and smoke, pay attention to what happened and quit again.
Many former smokers quit several times before staying smoke-free for a year or more.
Consult your health care provider for advice on the nicotine replacement, Zyban, as well as developing a health plan to stop smoking or chewing. Pregnant or lactating women should consult a physician before using nicotine replacement therapy.