This is something that has been troubling me for some time--I've heard that it's really important to get good mentors during medical school, but no one says how to do that. Some schools have mentorship programs, but what if you are interested in someone who isn't part of a program and isn't your professor? Do you just arrange a meeting with them and ask them point blank to be your mentor? Or if you arrange several meetings, is it assumed that you have a mentorship relationship? Also, are there unspoken rules about who can be a mentor--for example, don't bother asking someone who is famous in their field and busy with residents?