If you have a reasonable amount of control why not draw a line in the sand? Go cold turkey and make today day one, instead of day one being potentially 2 weeks from now. Doesn't that sound exciting? If you can't buck up now what makes you think you will when you've tapered down to 2 beers at night. You're going to guzzle down those two beers within 15 minutes and then think to yourself "Man, it's still early and I don't feel sleepy yet. Perhaps a couple more...just to calm me down..."
I used a saying, "If not now then when?" If I couldn't make today day one then I knew I wouldn't be able to make it a week from today. I kept pushing my date back until I was able to make today my day one.
"down here we got our act clean yesterday, and we have plans of cleaning up our act tomorrow, but what we never do is clean up our act today."