Yvain is one of Less Wrong's best and most prolific writers. I suspect many Less Wrongers haven't read his posts. Here's an index of Yvain's articles (not including meta posts, ranked by upvotes (like on my post index):

Generalizing from One Example (176)
Diseased Thinking: Dissolving Questions about Disease (154)
Eight Short Studies on Excuses (137)
Confidence Levels Inside and Outside an Argument (97)
The Least Convenient Possible World (96)
Intellectual Hipsters and Metacontrarianism (94)
The Apologist and the Revolutionary (92)
Are Wireheads Happy? (89)
Doing Your Good Deed for the Day (85)
Efficient Charity: Do Unto Others... (78)
Defense Against the Dark Arts: Case Study #1 (72)
How to Not Lose an Argument (71)
A Parable of Obsolete Ideologies (71)
Extreme Rationality: It's Not That Great (70)
Shut Up and Guess (64)
Simultaneously Right and Wrong (62)
Beware Trivial Inconveniences (61)
The Trouble with 'Good' (60)
That Other Kind of Status (57)
Never Leave Your Room (54)
Guilt: Another Gift Nobody Wants (52)
Missing the Trees for the Forest (50)
Techniques for Probability Estimates (50)
The Mystery of the Haunted Rationalist (50)
Offense Versus Harm Minimization (49)
The Power of Positivist Thinking (46)
When Truth Isn't Enough (44)
Book Review: The Root of Thought (41)
Conflicts Between Mental Subagents: Expanding Wei Dai's Master-Slave Model (40)
Diplomacy as a Game Theory Laboratory (39)
Typical Mind and Politics (39)
The Skeptic's Trilemma (37)
The 'Spot the Fakes' Test (36)
Blue- and Yellow-Tinted Choices (36)
Applied Picoeconomics (36)
Antagonizing Opioid Receptors for (Prevention of) Fun and Profit (34)
What I Tell You Three Times is True (33)
Where's Your Sense of Mystery? (30)
Would Your Real Preferences Please Stand Up? (30)
Crowley on Religious Experience (29)
Solutions to Political Problems as Counterfactuals (28)
Why Real Men Wear Pink (28)
Rationalist Poetry Fans, Unite! (27)
Why Support the Underdog? (27)
The Zombie Preacher of Somerset (24)
Are You a Solar Deity? (24)
The Implicit Association Test (23)
More Thought on Assertions (22)
Fight Biases, or Route Around Them? (22)
Bogus Pipeline, Bona Fide Pipeline (19)
Help, Help, I'm Being Oppressed! (19)
It's Not Like Anything to Be a Bat (12)
Framing Effects in Anthropology (1)