Quitting is tough, but it can be done. After smoking a pipe for over 40 years, in 2001 I quit "cold Turkey" and havent had a relapse, although I have thought about it a time or two when things get stressed. To me, my pipe was my pacifier, as it was always in my mouth, lit or not. Dont know how many bits I've broken over the years. At the time of me quitting, I came down with a severe case of Broncidas (sp), and of course, the smoking tasted bad, so I thought I would just lay off for a bit. Needless to say, here 8 years later I am still "clean", but I have been diagnoised with mild COPD. I stopped in time, but still get winded if I over exert myself. You dont need all them anti-smoking aids either, like the gum, etc. Just have to put your foot down.
As to drinking....... I was a social drinker, but when I did, I went overboard. One night, in a spa, I passed out and went to the bottom and about drowned.......havent had a touch of booze since 1984.....
So, just put your mind to it, and it can be tough. Go to AA meetings if that will help; as I know it helped one of my sons.