I stumbled across a great site for Freelancers of all types while researching rates that writers charge.
Freelance Switch offers a blog, forum, resources, and books for the person looking to make the switch to a freelance career in their field of expertise.
The Rate Calculator was helpful to me as a writer and as a comedian.
I’ve added Freelance Switch to my “Links I Like”
UPDATE: September 3, 2018–The Freelance Switch link now re-directs to The Wayback Machine Archives. The site seems to be complete and accessible.
Current links and resources for freelancing and blogging are also available at BloggingdotCom.