"Media Match is an online database of over 100,000 TV and film professionals' resumes and availabilities, and an up to date TV and film jobs board for new openings in the film and TV production business across the United States."
An excellent database with tools to help write resumes and cover letters, do career research, and conduct job searches.
Occupational Outlook Handbook
The Occupational Outlook Handbook is a great source of career information on duties, education and training, pay, and outlook for hundreds of occupations.
Here are some career profiles relevant to Radio Television Film: