When I used to consider quitting I would come up with 100 reasons why I couldn't. There's a game on today, its Friday, hell its Tuesday. When I finally did quit it was because I didn't consider anything else but I'm done. I said if not today then when? I had no answer, so that was it. I never and have not since considered drinking again. That's not to say I haven't felt the desire to, it's that I won't consider doing it at all.
That's what has worked for me thus far.