Gratitude has been my strongest tool. I start every morning right here.
Actively writing it out every morning. Reading it from others. Reading it when I’m struggling.
I got so much to be grateful for when I’m sober. I got nothing when I’m drinking. Not a damn thing.
I think there’s an open spot on that thread for one more. 
Great bunch of people on it.
Edit: it’ll retrain your brain when you do it often enough.