I did a lot of personal development and spiritual work that taught me very practical tools for 'being with' the uncomfortable sensations that arise around choosing not to drink. Armed with the confidence that brought me, I simply lost interest. Surrounding myself with other people doing the same thing also helps a lot I'm sure. I didn't keep alcohol in the house until someone was moving and gifted me some.

Occasionally I'll have a drink, but I have higher sensory clarity now from meditating and I typically find it neutral to unpleasant, unless it's just the right situation.

What also helps is taking other lightweight mind altering substances for evenings when I want to have social fun. I recommend going down the research chemical rabbit hole and looking at the dissociatives especially.

At the end of the day though, it took a lot of time and drastic lifestyle shifts over years. For what it's worth, I don't think self discipline is the right approach, for the same reason it's not an effective way to treat any other addiction.