If you're a songwriter I'd like to recommend a couple of blogs that I've been enjoying and just got around to adding to my blogroll.
Teacher and author Gary Ewer writes the Essential Secrets of Songwriting blog which is an absolute mine of great info. Check out some of the following for starters -
What you need to know before writing your next melody
Dealing with emotion is tricky
Letting a hook disappear
Singer/songwriter Sharon Goldman blogs at Songwriting Scene which has a less 'educational' tone and is more of a relational sharing of experiences & wisdom. I really like -
The Random Song Generator
Interview with Songwriting author Paul Zollo
Sorting the scraps of your songwriting
Check 'em out.
A Songwriting Masterclass with Peter Jackson and Steven Spielberg
Top 10 reasons NOT to write songs for your church
My latest song: You Spoke The Stars
Other free songs by Matt Blick