One of my favorites is The Book Designer, started by Joel Friedlander, a San Francisco Bay area publishing fixture. This site, with its newsletter and monthly magazine “Carnival of Indies” really does have something for everyone. Independent (self) publishing has come a long way in the last decade. The Book Designer has kept up with the times. You’ll find articles for newbies, writing tips, and in-depth how-tos for typesetting and cover making and e-book conversion. Check it out here.
If ever I was stumped or had a specific question, especially about book production or design, about new software resources, I’d start here.