Sequence index: Living Luminously
Previously in sequence: You Are Likely To Be Eaten By A Grue
Next in sequence: The ABC's of Luminosity

You can start from psych studies, personality tests, and feedback from people you know when you're learning about yourself. Then you can throw out the stuff that sounds off, keep what sounds good, and move on.

You may find your understanding of this post significantly improved if you read the first story from Seven Shiny Stories.

Where do you get your priors, when you start modeling yourself seriously instead of doing it by halfhearted intuition?

Well, one thing's for sure: not with the caliber of introspection you're most likely starting with. If you've spent any time on this site at all, you know people are riddled with biases and mechanisms for self-deception that systematically confound us about who we are. ("I'm splendid and brilliant! The last five hundred times I did non-splendid non-brilliant things were outrageous flukes!") Humans suck at most things, and obeying the edict "Know thyself!" is not a special case.

The outside view has gotten a bit of a bad rap, but I'm going to defend it - as a jumping-off point, anyway - when I fill our luminosity toolbox. There's a major body of literature designed to figure out just what the hell happens inside our skulls: it's called psychology, and they have a rather impressive track record. For instance, learning about heuristics and biases may let you detect them in action in yourself. I can often tell when I'm about to be subject to the bystander effect ("There is someone sitting in the middle of the road. Should I call 911? I mean, she's sitting up and everything and there are non-alarmed people looking at her - but gosh, I probably don't look alarmed either..."), have made some progress in reducing the extent to which I generalize from one example ("How are you not all driven insane by the spatters of oil all over the stove?!"), and am suspicious when I think I might be above average in some way and have no hard data to back it up ("Now I can be confident that I am in fact good at this sort of problem: I answered all of these questions and most people can't, according to someone who has no motivation to lie!"). Now, even if you are a standard psych study subject, of course you aren't going to align with every psychol...