Cloves.
Personally, I don't see why people quit. Cigarettes cause cancer. As does the sun, sunscreen, artificial light, the chemicals in the air (moreso than cigarettes; in Providence, I would be safer smoking a pack of cigarettes a day inside, and wearing a gasmask outside), so you're pretty much out of luck avoiding carcinogens unless you live in a lightless room with filtered air. Which you don't, since you have a computer screen.
As for addiction, you're already addicted to air, water, protein, fat, and various vitamins. What's wrong with adding something debonair to the list?