Occupational Outlook Handbook 2008-09 - is a nationally recognized source of career information, designed to provide valuable assistance to individuals making decisions about their future work lives. 
Bureau of Labor of Labor Statistics
CollegeGrad.com - Career and occupational information, including nature of the work, working conditions, employment, training and advancement, job outlook, earnings,
Career Overview - Careers, career information, career descriptions, career education and job search guide for aspiring career professionals.
Ball State Career Quest - helps match your personality to academic majors and careers.
Career Voyages -   Includes information about "on-the-job training, apprenticeship programs for skilled trades, and two-year professional degree programs at community colleges." From the U.S. Department of Labor and the U.S. Department of Education.
Life Works - This site explores over 100 careers in the health and medical sciences.
My Future - features information on military careers. Studentjobs.gov
Federal government employment opportunities for high school and college students.
URL: http://www.studentjobs.gov/