Hi Work, I did Dry January last year and the year before. I think it's a great way to start the year because, if you can do it you know that you can do it again. If you can't do it, then maybe it's time to admit that alcohol is having more influence than you'd like.
My advice would be to grab every opportunity for a dry day. We all know how much better we feel about ourselves on those days so it's great for a positive and healthy mind.
Accept that there will be days when you drink and plan those days carefully so that you don't overdrink or let it continue into the days following the event.
All of these things help to break habits, patterns, cycles and put you back in the driving seat. For example, I have a lovely long stretch now until a planned meal out with friends on the 9th of December. That's 18 days away. Until then, I'm not going to drink. I'm going to eat well, lots of veggies and fruit. Homemade soups, one pot casseroles, roast dinners, etc. I'll drink water with ice and lemon, or lime and soda, or herbal teas (pukka detox is a favourite) and I'll go to bed early to catch up on my reading.
I've got 18 days where I'll have lovely sleep, my skin with be nourished, my hair will be styled, my wobbly bits will be less wobbly 
and I will feel so good about myself.
That is my gift to myself. I do it a lot and I love it! Honestly, drinking just makes us feel like shit - mind, body and soul. Once you get used to not doing it so often, you really do feel so much better about yourself.
Good luck to everyone on Day 1 today, or 2 or 3...
Keep at it. Every AF day is a fantastic victory 