Site from the Automattic team geared towards people trying to make a living off of WordPress. Given who it's from, it's pretty much a must-read if you're trying to make a living off of WordPress.
List of job posting websites for creative professionals. Good resource if you're looking for work or if you're looking to hire someone.
I tend to get on a soapbox whenever I talk about resumes of designers. That's because I have to wade through them to try to find qualified candidates. Do something interesting! This post has a few suggestions on the things that you can do. I particularly like the suggestion--repeated several times--that you use storytelling in your resume.
This is a good starting point for crystallizing what you want to achieve with your business and how you're going to go about doing it.
Huge list of sites for finding freelance work or, if you're a company, to hire freelancers.