It took me seven tries, some cold turkey, some using aids (not the modern chemical kind), to finally quit. That was more than three decades ago. To this very day, if I'm around people smoking in certain situations, the urge to have one can still return. It's not very strong, but it's still there after all this time. All I can say is that you have to approach it like the twelve step programs teach you. Today, I'm not going to have a cigarette. There's no other way to do it. And forgive yourself if you mess up a day. Just take the next day as a fresh start. Wish I could offer you more, but this is one of the most addictive habits people can have.