About.com's Online Career Resource Center
This is a very comprehensive site with a number of interesting articles and links about planning your career.

California Conservation Corps
The California Conservation Corps is a workforce development program that offers young men and women the chance to serve their state and become employable citizens through life skills training and hard work in environmental conservation, fire protection, and emergency response.

WetFeet.com
Plenty of information about occupations, career changes, and high-tech jobs.

The Job Hunter's Bible
This website is the sister publication to the book What Color is Your Parachute? It contains a number of interesting links and career-planning tips.

The Job Web's Catapult Site
This site is organized by type of career, and contains a number of useful links and tips.

The Keirsey Temperament Website
This site contains free online personality quizzes that can be extremely useful in assessing your career goals.

The Occupational Outlook Handbook
This site lets you search for a job description by title or keyword, and provides a comprehensive report that details the nature of the work you'd perform, the employment outlook for that profession, the training and qualifications necessary, as well as the average salary you could expect. Extremely useful for those exploring new career options.

The College of the Redwoods Career Center
This site contains a number of good articles about career planning and job success. It also explains how to use the CR Resource Center.

USJobs.com
Provides useful tips on how to research employers using the Internet.

The Career Zone
A great instant way to assess your interests and find out what careers might work for you. Lets you choose 3 different categories to describe your interests, then issues a report detailing what careers might work for you and the skills required for each.