Artist Resource Sites
Artist Resource (SF Bay Area)
The Artist's Toolbox (Resources for the Graphics Professional)

Associations
SCBWI: Society of Children's Book Writers and Illustrators
Communication Arts
Graphic Artists Guild
Society of Illustrators


Job Hunting For Artists
Artist Resource
Communication Arts
Craig's List
What Color is Your Parachute?


Magazines
How
Step-By-Step
Communication Arts


Practical Money Advice
Motley Fools
T. Rowe Price

Reference Image Sources:
(Listed in the order I've found most useful)
Corbis
Photos To Go
PhotoDisc
ArtToday
Library of Congress


Schools:
(I went to the Academy of Art; all of these are respected schools, and there are of course many more, but these are ones I've heard good word-of-mouth about from artists I respect.)
Academy of Art College
Art Center College of Design
Kansas City Art Institute
Rhode Island School of Design
San Jose State (Illustration Dept.)

Ongoing Self-Education:
Lynda.com (for learning graphics software)
The Artist's Toolbox (for keeping current with software, methods, etc.)
Web Pages That Suck.com (for reminding oneself what _not_ to do)

Useful Children's Book Websites:
The Purple Crayon
Drawing Board For Illustrators
SCBWI: Society of Children's Book Writers and Illustrators