I add to my list of RSS feeds whenever I see a blog that has the potential for ongoing quality articles I want to read.  I'm sure there are hundreds and thousands of great blogs, but I'm going to list some of my favorites for writers:

Author! Author!
Brooklyn Arden
Editorial Anonymous
Pub Rants
The Rejecter
Lit Agent X
Advanced Fiction Writing Blog
Story Sensei

Now that you know what I like, let me know if there are other similar blogs I should be reading.