13.5 months sober, i've been to maybe 5 meetings the entire time. I find them largely useless for actually staying sober, I go to pick up my milestone chips (6months, 1 year).
I only got sober after relapsing, and I got sober because one day I woke up and I simply had had enough.
The only way (so far) I think you can maintain sobriety is having something change on a fundamental level in your head. Enough is enough sort of thing. Wish i had a better answer, but you either reach that point and quit, or you don't. I hope you all reach that point. My continued self-reflection will hopefully give me a better way to explain this.