I agree with Tommyk. But, specifically, boredom is a huge trigger for me... Idle hands and all that. Until I realized that drinking itself had becoming a boring nightmare.
Also, certain favourite albums/songs that were the soundtrack to my binges. I couldn't bear listening to them without automatically thinking about drinking. Currently reintroducing them in my life when I go for long walks in the park - a safe distance away from the nearest corkscrew.