Recently, I participated in a faculty development forum in which the consulting organization recommended creating a constellation of mentors rather than relying on one or two individuals to provide a majority of information about career development and related topics. The idea fascinated me because creating a constellation of mentors meant that you could seek to understand various aspects of your career from individuals whose strengths lay in specific areas: teaching, methods, grants, publishing, dealing with jerks in academe (I threw that in to see if you were actually reading this), etc. I've found that assigned mentors tend to be the least useful in key areas, so having a group has helped me in academe and in practice.