It's hard to stop doing something that you are not ready to quit doing. I am an alcoholic/addict. I have 13 months of sobriety from painkillers and booze. I quit smoking 7 years ago. So I know the hell involved in doing the "right" thing. But when I stopped smoking, I was ready to quit. I was disgusted in the way I felt, and how much I was spending on smokes. I smoked two and a half packs a day, so it adds up.
As far as the alcohol and drugs, I was also ready to quit that too. I was probably close to death a couple of times, and I was on the brink of losing my family. Nothing is worth losing my wife and children. Nothing.
I think we all really HAVE to WANT to stop doing something for us to succeed in quitting. It's the number one step, realizing that it is a problem, and that you are powerless over your addiction.
10 out of 10 doctors recommend quitting smoking.
Good luck to you.