Two of my closest friends died from lung cancer - one smoked daily starting at age 13 (she died at 41), and the other had quit 15 years before she died. I am glad I gave it up. One vice is plenty for me to deal with.
Leviathan what helped me was I started running. I figured I couldn't smoke and run, so it really helped. The first two weeks were killer, but then it slowly got better, to the point now where I can't stand it.
I hope that's how I'll feel down the road about alcohol.