I know this may sound weird but I wanted to just prove I was strong to quit. I failed 3 times before gradually slowing down to never fully quit 2 of the times sneaking one hear or there. The third time I quit for 3 months using a quit smoking drug, an unfortunate stressor happened and I started again. I am currently just past 5 years after trying for a fourth time and I did it using myself against me. I picked a day and challenged myself to beat myself by keeping cigarettes, cigars and lighters in all the normal places I smoked. I would tell myself they are right there and I have a choice. It worked for me, I still to this day have a pack on my kitchen counter and a pack in my garage. Hope that makes sense as it made me very strong mentally.