I do not like the term mentor. It is a perfectly fine word, it is just that I have a suspicion of the people who tend to use it. I prefer to think about people I would like to be like; or not. And think about how some people can help me; or hinder me. But the following exchange between Nassim Taleb and Tyler Cowen is fine.
TALEB: I don’t know, but I know how to find inverse mentors.
COWEN: How do you do that?
TALEB: People — you know they’re doing something wrong, and you figure out what makes them do something wrong. There’s a fellow I worked with, and I knew that he was a complete failure but a nice person. When he would do something wrong, he was always caught into details. I realized that there’s only one set of details. You cannot get into more than one set of detail. So that’s one thing I learned.
Also, I find inverse role models, people you don’t want to be like when you grow up.You pick someone and you go with it. You have an instinct to know what you don’t want to look like. Look at what they’ve done, what they do, and then you counter-imitate. You do a reverse imitation, and it works.