These are some resources I think are very valuable to writers.

Judith Claire Counseling - Personal, Career, Business  -  Judith works with many creative types from writers, to producers, directors, and actors.  She's also my career counselor (and a darn good one).

Linda Seger - Linda's books have been a huge help to me.  Making A Good Writer Great, Making a Good Script Great, and Web Thinking are the top three on my keeper bookshelf.

Fiction Factor is one of the greatest resources on the web for writers.  Sign up for their incredible FREE newsletter!

Absolute Write is full of articles, interviews, and columns for writers.  They also have newsletters with market updates!