As a former smoker I believe that the best way to quit smoking is cold turkey. Sure, the withdrawal phase is a hell but in my case that helped me realize just how addictive that shit was. Before I’d never imagine that quitting would cause me depression or sleeping problems. All that, and a lot more, helped me understand how much my body was reliant on cigarettes. From my experience most smokers don’t realize how addictive and dependent they are on their habit. If they were perhaps they’d think twice before lighting another one.