Rare that something can be hilarious and useful.

Check out this site for reatment for dreaded writers block. My fave: How to kill a character.

http://www.webook.com/911writersblock

Also, usefu. Maybe other writers already know this stuff but I like to think of this site as my editor on my shoulder. Only smaller and lighter than my editor who would surely hurt my back. 

 http://www.drgrammar.org/faqs/

 Thanks to MrsK for the cool links.