St. Ignatius said "who the devil would tempt, he tells not a lie but a lesser truth." in your case, alcohol is a lesser truth.
Ultimately, when you reach for that drink, or that extra plate of food, or that pack of cigarettes, you're attempting to supress your ego, and what you're really doing is taking a shortcut to god (or spiritual sustenance).
It's as if your ego is saying to you, "hey pal, i'm in pain here. I'm tired, i've had a hard day, or whatever... You can't get through this day without giving me (fill in the blank)."
but it is all a half-truth, or half-lie. You've got to fake it until you make it... When you want a drink, have a glass of water and go for a walk instead. Or have a glass of grape juice... Find some other behavior to replace it... When you repeat it enough, you finally discover that your mind and body appeciate the change. Also try the obitz book too...
Good luck