So please post (1) the one article that you think newcomers should read, to maximize the chance that they read more; and (2) articles you think should be in the first ten articles that a newcomer reads.

The order in which I would have liked to be introduced to Less Wrong (introduction, wisdom, insight, education, excitement, novelty, fun):

Introduction

• Twelve Virtues of Rationality
• An interview with Eliezer Yudkowsky (Parts 1, 2 and 3)

Wisdom & Insight

• Diseased thinking: dissolving questions about disease
• Self-fulfilling correlations
• Probability is in the Mind
• You're Entitled to Arguments, But Not (That Particular) Proof
• Efficient Charity: Do Unto Others...
• Newcomb's Problem and Regret of Rationality
• Occam's Razor
• Confidence levels inside and outside an argument

Education

• An Intuitive Explanation of Bayes’ Theorem

Excitement, Novelty, Fun

• The Apologist and the Revolutionary
• Beyond the Reach of God
• The mathematical universe: the map that is the territory
• That Alien Message
• A Much Better Life?

More

• List of all articles from Less Wrong (In chronological order.)
• References & Resources for LessWrong