List of communities
Communities which may be useful to aspiring rationalists. Changes may be suggested in this comments thread or edited directly.
Change my view - place to get your view challenged
Skeptics Stack Exchange - useful for confirming factual claims you are skeptical of. Requires specific, answerable questions
Straight dope - similar to Skeptics, but less strict on the questions accepted
Cognitive Science - you are expected to do your reading first, but useful if your want to lean about what the research says