I used to smoke, took me multiple tries to finally quit. Best way is cold turkey, when I would quit, I would find myself sometimes sitting there thinking I want a cigarette, when that happened I would find myself something to do, best way to quit is to keep yourself busy when you get that craving. They say it takes 3 days to break the physical craving for nicotine, so set your sights on quitting for just three days.
Dying from lung cancer is a long, painful, expensive way to die.