I'll reiterate something another poster said, since it isnt' getting enough credit: Read HP:MoR. It's a fanfic of Harry Potter, written by the same Eliezer Yu

I'll reiterate something another poster said, since it isnt' getting enough credit: Read HP:MoR. It's a fanfic of Harry Potter, written by the same Eliezer Yudkowsky who wrote much of Less Wrong. It was specifically written to convey the feeling of "what it means to be a rationalist". For those who aren't into Harry Potter or into Fanfiction (like me), I can tell you this: Suprisingly, it is one of the best stories I've ever read. And I'm talking just as a story, nevermind the other value you can get form it, which is a good introduction to the "rationalist" community. I'd argue that the BEST way to understand what is going on at LessWrong is to read HP:MoR, as it was intended to be such an intro and succeeds masterfully, while being amazingly fun.