I'm not an artist but my mother and sister were and some of my best friends are and I know how tough it is in the freelance art world. Zero2Illo is a site/blog that was started by a graphic artist to chart his own work/success and has grown into a supportive social network. Their current mission statement is: to enable and empower more creative entrepreneurs and illustrators to earn a living from their creative skills.
Right now (and through Wednesday, Zero2Illo is offering an amazing sale on tools for artists who want to expand their freelance careers. They're offering a bunch of books bundled for only $47. Check out the sale. And consider joining the community. We're all in this together, right?