For me the just sharing with others that knew what I was going through was a relief.
The most important thing I got very quickly was to get out of my pity party mode. There were situations discussed that were better than mine (IMO), and situations that were far worse. It gave me some perspective on my life to remember it was not all **** - I had a great career, I am healthy, wonderful family etc. - that was motivation to do something about it rather than wallow in the misery of the relapse.