I just have to remind myself over and over again that when everyone else goes back to their normal lives the next day, I don't. Having a crazy night isn't something I'm physically capable of anymore, because once I start I'll drink every single day. I just have to keep very present in my mind the consequences. It's hard! I probably should have quit at 25 but I didn't manage any serious sober time until 29 because I really wanted to be part of the party.
I've gotten really good about being around people drinking while staying sober and still enjoying myself. But I'm also much better now at just leaving when it's too much for me.