I remember praying to God before going to bed and asking Him not to wake me up the next morning. I wanted to die. I remember that hangover from that next morning. That is a big key.
I have also been to see some bands at bars and went to karaoke with people drinking. I watch them fall. I watch them make fools of themselves.
I go to an AA meeting and hear stories worse than mine and relize that it could be me doing that if I go back out.