Occupational Outlook Handbook - A searchable guide to career information about hundreds of occupations.
careeronestop - Students can explore career and education options, includes career assessments. Sponsored by the U.S. Department of Labor.
O*Net Online - has detailed descriptions of the world of work for job seekers and students. It is sponsored by the U.S. Department of Labor.
Glassdoor - A job search website that offers an inside look into companies, salaries, and interview questions from the real employees perspective.
Do a Google search from here for a career that might interest you. Simply add the occupation you would like to search before the syntax supplied.