Whats the best way to quit smoking?

Well, I stopped smoking about 9 years ago.
I just got tired of cigarettes, and somehow began to feel them disgusting.
I made an anchor - I promised my gf I quit smoking and managed to do it just by stopping buying cigarettes.

Next 6 months were pretty hard because of thoughts in the head about tobacco. But after a year I completely stopped to think about that crap and never tried it again.