Believe in your deepest being that nothing can shake you, and then put your sobriety in a place that will be untouchable by anything. Make it unthinkable to to ever drink again, something that you simply will never ever do. I feel that belief system is the place to start.
For me, that brings the contentment and peace you are feeling now to another higher level. Being drunk or even smelling of alcohol is a shame that will not ever occur again. You are new again, with a fresh start. You are doing this amazing thing right this minute - what else can you do?