I tried and failed many times. I just couldn't get over the cravings that would sieze me every evening and was fearful that I was not going to beat my alcoholism. In the end that fear lead me to the solution, if I couldn't beat the cravings by willpower then I would have to remove the cravings. And I did. By getting up around 5 am, running a fair distance, every day. Doing a days work, coming home, cooking a meal and then falling into bed exhausted bt 9pm (ish) I did that for 3 months and then a less extreme version for a year or so. It worked for me as I am not very good at things like mindfulness or positive thinking etc.
Keep at it and good luck.