There are some very traditionally situations that are predictable triggers for relapse.

They generally are thought of as both internal and external. Internal ones would be uncomfortable feelings, such as return of depression, return of anxiety, return of certain stressors, a re-remembering of certain traumas in one's life.

These are all internal states that bring about, often trigger, a relapse.

And then there are external ones, such as the friends and family and liquor stores and people that you associated with that often could trigger a relapse.