It's never to late to commit to sobriety again. Some people on here got sober using this board alone so you could spend more time on this board, or some other activity where you're actively fighting your drinking problem. Meetings, if you're into AA.
But I think there needs to be a daily commitment to making sobriety your #1 goal for the day, each day.
It's best to avoid tempting situations, especially in the beginning, and also best to avoid tempting yourself by fantasizing about drinking.