Mathematical Sciences Career Information
This site is put together by the AMS, the MAA, and SIAM.  It has information about careers in the mathematical sciences.

Graduate Study in the Computer and Mathematical Sciences: A Survival Manual
This is a survival manual for graduate students put together by Dianne Prost O’Leary at the University of Maryland, College Park.  It has information about applying to graduate school, about being a graduate student, and about finding a job when you complete graduate school.