Here is a "mantra" card to rationality. http://firstdiscipline.wordpress.com/2010/12/16/communitysocialintelligencelearning-a-meta-systems-perspective/ Like all mantras it might take a little time to unravel, but it works when you get to the meaning of the mantra.
Note: This was originally posted in the discussion area, but motions to move it to the top level were made.
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My own desire to improve my rationality coupled with some posts criticizing LessWrong not too long ago led to an idea. For reference, the posts I mean are these: