The way I stopped smoking after 20 years of 30 a day, was to consciously imagine negative things each time I smoked one (and remembered to do it). I would thin

The way I stopped smoking after 20 years of 30 a day, was to consciously imagine negative things each time I smoked one (and remembered to do it). I would think of how bad they could taste first thing in the morning sometimes, a mental image of a stale full ashtray close up together with the bad smell of it, and a slight feeling of gagging and throwing up one sometimes experienced. All while continuing to puff away without restraint. Over time, I noticed I was not finishing an increasing number of cigarettes entirely, and that I was feeling a bit sick. I reinforced that negative feeling when I noticed it. Eventually I just... stopped. When I thought of a cigarette I felt bad and the negative feelings would overtake me. I would call it stopping without trying. I wonder if this is a form of thought "replacement".