A close family member lost their battle with alcoholism and died a horrible death. He was the person I learned my drinking habits from and sometimes I wonder if his spirit was there to help me see myself with unbiased eyes for the first time in years because one day it just clicked that his fate would also be mine if I didn't stop.
Also having a child was a huge motivator. I say this a lot, so ignore if you've read it before, but when the desire to quit popped into my brain, a voice inside, just a tiny bit louder than my A told me to grab onto sobriety with both hands and hold on for dear life. I'm so glad I did.