http://queryshark.blogspot.com/ Do yourself a favor and read every single query. Twice.
http://bookendslitagency.blogspot.com/ No longer blogging but all their invaluable advice in along the right side GO THERE!
http://www.wiseinkblog.com/ Wise, Ink some of the best advice from simple to huge
http://navigatingtheslushpile.blogspot.com/2011/04/formatting-your-ms.html One of my favorite blogs!