Different things work for different people. Some people like to drink and do so daily (or nearly so), but really and truly can stop on a dime. For some others it's a literally unkickable addiction--if they have access to alcohol they will drink, regardless of anything else. (And I mean *anything* else: health, family, career...) And a lot of habitual drinkers are between those two poles.
So anyone who comes up with a single approach (that allegedly works for everyone) is blowing smoke. But fortunately there are a lot of different treatment modalities for people who want to quit or cut back. (Some people don't want to--again, regardless of anything else.) I'm glad that posters are mentioning different things in this thread and hope it continues--the more approaches that are listed, the more likely that an individual can find something that clicks for her/him.
Though I'm probably an alcoholic (Scottish and American Indian ancestry--you do the math), I've never been sure because I've never taken a drink, and at this point (age 60+) probably never will. I'm married to an alcoholic, and the drinking has mostly killed our marriage and messed up our kids big-time; ironically, it took me quite a while to realize what was going on...because, never having been drunk, I couldn't really recognize the signs.
For others who have an alcoholic SO, I can suggest Al-Anon. It "worked" for me, in that I never left a meeting without having heard/learned something that made *me* better; but because I couldn't buy the "higher power" bit, I wasn't strongly motivated to stay with it. I know it works very, very well for some, so it's worth giving it a try.