I never bothered with Monster myself. I can't seem to remember the login information even although I have visited the Career Center few times to retrieve the password.
Statistics show that a large percentage of jobs are introduced through networking.
Employers tend to give colleagues, relatives and friends the priority when introducing open slots for a job, rather than a list of prospective candidates.
Off topic: Would be nice to see large companies making a recruitment stop at Cal Poly Pomona instead of visiting only UC campuses.