One way to keep yourself motivated during the quitting process is to focus on the rewards you'll enjoy as a non-smoker. No matter how old you are, or how long you've been smoking, quitting will improve your health, and the way you feel. And those benefits start almost immediately.

Within 12 hours after you have your last cigarette, your body will begin to heal itself. The levels of carbon monoxide and nicotine in your system will decline rapidly, and your heart and lungs will begin to repair the damage caused by cigarette smoke.*

Within a few days you will probably begin to notice some remarkable changes in your body. Your sense of smell and taste may improve. You will breathe easier, and your smoker's hack will begin to disappear, although you may notice that you will continue to cough for a while. And you will be free from the mess, smell, inconvenience, expense, and dependence of cigarette smoking.*

*Quoted from The National Cancer Institute's "Clearing the Air: How to Quit Smoking...And Quit for Keeps" guide.