1. Snuffing out cigarettes, following a healthy diet and adopting an active lifestyle can reduce your cancer risk by 60 percent to 70 percent, according to the American Institute for Cancer Research.

2. Another reason to quit smoking: Cigarette smokers are more likely than nonsmokers to go blind late in life. A review of studies conducted by researchers in the U.K. showed that smokers had a two-to threefold increase in the risk of developing age-related macular degeneration (AMD).

3. Studies show that women who smoke about one pack of cigarettes a day will have an average deficit of 5% to 10% in bone density, which increases the risk of osteoporosis. Quit smoking. It may also help to cut alcohol and caffeine from your diet and to exercise regularly.

4. Smokers are 3-4 times more likely to experience fatal heart attacks than nonsmokers. Within a year of quitting, a smoker's risk of heart attack is cut in half.