I think you'd maybe regret the posting on facebook - it sounds to me that, that would be a way of punishing yourself and would ultimately, lead to giving you more reason to drink? Just a thought.
It's hard as hell, in the beginning, but you've shown you really want to do this by posting here
How about 'just for today' ? We're all here for you, you know
Xx
PS. It IS a difficult time of year - everything falls flat after the excitement of the festive season but it's also the perfect time to quit - new year, new beginning. Not sure if any of this is helping?