Since becoming a rationalist, I've become (on average) happier, more adventurous, more tolerant of other people, more comfortable in a variety of situations, more motivated, more intentional, more understanding, less moody, less nihilistic, less contentious, and lots of other fun things. (Feel free to ask for evidence for these claims, I just didn't want to write all of that out now and make this reply even longer.)

I think the main ideas that the rest of that sort of latches onto are:

• Don't be afraid of the truth, and don't look for answers that confirm what you think

• You need to understand how things work in order to accomplish youg goals

• The universe is allowed to be terrible by human standards

And the more specific useful details that actually had changes in my life are:

• You're allowed to do things to accomplish your goals other than your cached thoughts

• Other people are different than me, and I should think from their perspective rather than extrapolating from myself

• Working in groups is really, really helpful for accomplishing things

• How to dissolve the question

• Take other people's advice

• Hold off on proposing solutions

• Don't listen to Bruce

It was addressed earlier here.

I'm fine with talking about it again, because a lot of that thread focused on Xixidu, and I'm all up for hearing more upbeat responses