Just to draw your attention to the Write a Book With Me link.
This link takes you to the WABWM blog where all writers are welcome.
There is a very generous Prize: Create a Character Clinic by Holly Lisle. A prize worth having. To see the details, head on over to the site.
I haven't done this particular course of Holly Lisle's but I have done How to Think Sideways (to write a novel) and How to Revise Your Novel (speaks for itself).
There are a whole host of other courses, reasonably priced and some freebies. Click on the link to Holly Lisle's site and have a look.
Holly's site is full of information. There are lots of tips for writers and links to other sites.