I have a year under my belt and what I did was research.
I educated myself on the cravings and triggers so I would know what to look for.
I had a real cause to quit, breathing. I was waking up short on breath and couldn't get it back for a few hours.
I always thought having a beer would be my biggest trigger, but it turned out to be work. I would walk outside every 1/2 hour and have a smoke, and there was always someone outside having a smoke, seems everyone smokes were I work at.
I would quit every night and by noon run down and buy another pack, so I finally just waited until the weekend so I would have a few days by myself and that were it started.
Its not easy by any means, and the first month was the worse for me, now I cant stand being around it....