I get a lot of mail from people asking questions  about how to get an agent, what to do about pictures, how to get into the unions, etc. Many of the answers to the questions a fledgling actor has can be found at the following sites--or at least,  a valid opinion or two...

An Actor's Mission (A Tinselnet Article)
So You Wanna Be An Actor: Info from SAG
Actorsource:  So You Wanna Be in Show Business

Are you Ready to Leave Your Modesty at Home and Cope with Rejection?
Acting School: Inspiration 101
Acting On Bad Advice


LA Actors Terminology Database
Talent & Creativity Development Resources

Back Stage Career: How-To ToolBox
Actor's Finishing School
Starting Off At Ground Zero
Acting 101: How to Break Into Show Business
Acting Is So-o-o Competitive ... Not!
Acting School: Charming 101

Gatekeepers...Casting Director Secrets: An Inside Look(A Tinselnet Article)
Spinning through the Workshop Whirl-i-gig(A Tinselnet Article)

Tips on How to Spot a Con

The Online Communicator: Talent
How far along are you in the process?(Eric Stone Studio)
What It takes to be an actor?(Eric Stone Studio)
Bob Fraser's 9 Steps to a Successful Acting Career
Bob Fraser's 7 Ways to Fail at Your Acting Career
Bob Fraser's 5 Good Reasons To Stop Acting
Finding a job in the entertainment industry
How to Get Into Acting (Ed Hooks)
Princeton Review Career Guide: Actor
All About Agents
Getting Started Part One
Getting Started Part Two
Guru Stu's Acting Tips (Stuart Lee Rosen)
Actors and Voice Training (Alex Epstein)
Is Your Child Model/Commercial Material? 
Showbiz Myths (for parents of child model/actors)
Career Exploration: The Personal Side of Work
Finding Your Character's Soul
Emotional Strains
Finding Your Type
Voice Over Studio Lingo