For me, it isn't about self-discipline so much? I'm one of those who if I feel that I am deprived of something it's all I can think about.
So I had to switch my perception of drinking. I'm sure I bore people here with saying this over and over, but I'll say it again
...
liberation not deprivation.
I am liberated from sleepless, sweaty, heart-pounding nights. I am liberated from wasted evenings I don't remember. I am liberated from reflux, rosacea, yellow eyes and skin, headaches, and most of my anxiety. I am liberated from the five pounds I kept putting back on. I am liberated from wasting money on wine.
Most of all I am liberated from the constant internal warfare about when to drink, how much to drink, how much is too much, how much did I have yesterday, what time is it, what time is too early, how much is left, how much will DH drink...that constant yammering in my head.
It's much quieter in there now.
You can choose to be freed from all that, too.