Additional Job Boards
Some of these sites are great in that they link you directly to the hiring company's website. These days, while many companies are impressed by a walk-in (and it will help your chances of success) they often require you fill out an electronic application. Be sure to know which position you would like to apply for before introducing yourself over the phone or in person (note: not email). Then, be sure to follow up after you've submitted the electronic application to be sure they received it.
Monster: www.monster.com
CareerBuilder: www.careerbuilder.com
Indeed: http://www.indeed.com
Jobhere: http://www.jobher.com/
JustJobs: http://justjobs.com/
ComputerJobs: http://computerjobs.net/
AfterCollege: http://www.aftercollege.com/
USA Jobs: http://www.usajobs.gov (for government jobs)
Engineering Jobs: http://engineeringjobs.com (for engineering jobs only)
Think Jobs: http://www.thinkjobs.com (for engineering jobs only)
EEweb: http://www.eeweb.com/jobs (For CpE, CS, and EE jobs only)
Dice: http://www.dice.com
Simply Hired: http://www.simplyhired.com
Link Up: http://www.linkup.com
RealMatch: http://www.realmatch.com
Idealist: http://www.idealist.org (for volunteer, non-profit, or humanitarian jobs)
Women for Hire: http://www.womenforhire.com (for women seeking advice and job openings)
Tech Centric: http://www.tech-centric.net (For CS and IT jobs only)
ZipRecruiter https://www.ziprecruiter.com/jobs