I am a proponent of AVRT, and only learned about it after having implemented it, more or less, when I joined SR and started reading here. AVRT and SMART share a common heritage, and I find they complement each other well since they both advocate personal empowerment and self efficacy.
I read the Crash Course on AVRT from the website (for free), and that was it. I use other tools too like mindfulness and again find a good match with the AVRT cognitive type approach to achieving and maintaining sobriety. I haven't joined the forum at Rational Recovery, since I see myself being recovered and all.
So, welcome to the Secular Connections forum, make yourself at home here. There is a lot of support here for you.