Beware indeed of giving others more bouncy walls on which evidence can re-bounce and double-, triple-, quatruple-, nay, Npple-count! I once naively thought to improve others' critical thinking by boosting their ability to appraise the quality of my own reasoning.
Lo' and behold, for each example I gave of a bad reasoning I had made or was making, each of them was inevitably using this as further evidence that I was right, because not only had I been right much more than not (counting hits and arguments are soldiers and all that), but the very fact that I was aware of any mistakes I was making proved that I could not make mistakes, for I would otherwise notice mistakes and thus correct myself.
TL;DR: This remains a profoundly important unsolved problem in large-scale distribution, teaching and implementation of cognitive enhancement and bias-overcoming techniques. It's even stated in Luke's "So you want to save the world" list of open problems as "raising the sanity waterline", a major strategic concern for ensuring maximal confidence of results in this incredibly absurd thing they're working on.
A few notes about the site mechanics
A few notes about the community
If English is not your first language, don't let that make you afraid to post or comment. You can get English help on Discussion- or Main-level posts by sending a PM to one of the following users (use the "send message" link on the upper right of their user page). Either put the text of the post in the PM, or just say that you'd like English help and you'll get a response with an email address.
* Normal_Anomaly
* Randaly
* shokwave
* Barry Cotter
A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site.
(Note from orthonormal: MBlume and other contributors wrote the original version of this welcome message, and I've stolen heavily from it.)