My Next Move is an excellent website providing searchable careers, browsing industries, and even an interest profile tool to help you discover more about yourself.
Live Career provides a list of online tools to help you prepare for college or to prepare for a career transition.
National Career Development Association indexes several online job sourcing sites and reviews various industries.
Johnson O'Conner Research Foundation provides more detail about aptitudes and several articles on the research that led to the development of the Highlands Ability Battery.
The Princeton Review article on choosing a college major.
Bureau of Labor Statistics has the most recent statistics on job outlook for various fields of work.
Psychology Today excellent resource for everything therapy related