Hi Mark. If you are interested in AVRT, there is the long running AVRT Discussion thread. That will keep you going for a while, with over 2000 posts. Off SR, I have found that the concept of Mindfulness to be an excellent adjunct to the ideas in Rational Recovery. For material, Eckhart Tolle has a couple of books and a strong online presence. I recommend reading him.
There is also
this link from SR