I think of LessWrong from a really, really pragmatic viewpoint: it's like software patches for your brain to eliminate costly bugs. There was a really good illustration in the Allais mini-sequence - that is a literal example of people throwing away their money because they refused to consider how their brain might let them down.
Edit: Related to The Lens That Sees Its Flaws.
We've had these for a year, I'm sure we all know what to do by now.
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