There seems to be a lot of knowledge that LessWrongers have which is fairly awesome, but not particularly well-covered on Less Wrong.
What other sites do people recommend?
I originally came to LW through HN, and Paul Graham was somewhat influential on my early high school thoughts.
I've poked through these a bit on recommendation from other people, and they seem ridiculously useful.
If you want to be super nice, could you link to some of your favorite posts/articles?
While it is dangerous as a time sink, it can be useful as a reference source, e.g. I've found a lot of good and clear dieting and fitness advice there, and it has the advantage of being separated from the profit motives you get on most online guides. Edit, Link http://www.reddit.com/help/faqs/Fitness#General