Only 33 days for me, so I won't pretend to be an expert. I quit smoking cold turkey, decided I wanted to lose weight and did it, and I finally (after a DUI) Decided I can no longer drink. I hope I am as successful with this, as I was with those.
I use SR, books I'm reading, and phone apps, as reminders of how far I've come, where I've been, and the road ahead. I'm not against social means of support, meetings and such, but from my experience with groups in differing settings, the people that attend often have their own agenda's and those often differ from the groups stated goals.
Gee, that kind of sounds like the atmosphere at my office!