I started smoking when I was a bored and lonely 17-year-old irrigating alfalfa fields in Utah for money and reading Zen and the Art of Motorcycle Maintenance for enlightenment. I smoked watching magpies splash in the ditch, and for 20 years I kept sucking those nasty things for reasons of self-loathing and distraction, and mainly because I couldn’t stop. In 1996, just before my son was born, I put a lid on it. I wasn’t going to contaminate my babies with second-hand smoke. And it wasn't hard to figure...
After 48 hours: Your ability to taste and smell starts to return.
After 72 hours: The bronchial tubes (airways) relax.
After two weeks to three months: Your circulation improves.
After one to nine months: Cilia (tiny hairs) in the lungs regrow, increasing the lung's capacity to handle mucus, clean itself, and reduce infection. Coughing, sinus congestion, fatigue, and shortness of breath also decrease.
After one to five years: Your risk of dying from heart disease is cut to half that of a lifelong smoker's risk.
After 10 years: Your risk of dying from lung cancer drops to almost the same rate as that of a lifelong nonsmoker. Your risk for mouth, larynx, and other cancers decreases.