We can learn from the "mistake" what can we do to prevent this from happening again?
If we walk away stronger and more resilient to this overcoming us again then that is the best thing we can do.
We make the call before we drink, we talk it through, we get to a meeting, we put it off until we talk to at least 3 people including our sponsor. By the time we get to the third person we have generally thought it through enough to know what a bad idea it is.
Today is a new day, you can do this, stay strong, keep moving forward.