Where are the best places you, as a veteran, have found to talk to others about post combat and deployment stress?

I write a lot on the website Quora. There, a veteran asked this question: How do I deal with the bitterness that has been festering inside of me since I've returned from the Middle East?

I answered, but part of what I advised was speaking with other veterans. I'm curious where other veterans today reach out and find community they can open to about shared military experiences, positive and negative.