May sound silly but "If you don't drink, you don't get drunk". Keeping that in mind helped.
Also "playing the tape all the way through" helped and does to this day. What I mean by that is when the thought of a drink crosses my mind I think of what drinking has always ultimately brought me; unmanagebility, sorrow, pain, destruction, embarrassment, financial ruin, pain to those that love and care about me, physical health problems, knowing I could not continue drinking but not knowing how to live without drinking, etc.... By thinking about what the first drink will lead to it helps me to remember why I wanted to stop drinking in the first place.