First run through HALT. Are you hungry, angry, lonely, or tired? Yesterday when I wanted to drink I was three of four.
Next, do you have anyone you can call? Preferably someone in recovery or a sponsor, but even someone to just shoot the breeze...
Keep playing the tape to the end. Remember all the negative feelings and actions that made you decide to stop drinking. As yourself what you will gain by drinking.
I find myself getting very frustrated when I want a drink because I expect to be past that by now, but that only makes things worse. I have to remember that I'm still in sobriety infancy and that it's ok to feel pissed, angry, annoyed when I want to drink but I don't have to act on it.
I hope some of this helps. Keep posting here!