I figured I'd put together a list today of some great and helpful sites. Along with an explanation of them.
Great database of agents:
www.writersmarket.com Although this requires buying a subscription.
Great information on how to write Queries:
http://www.charlottedillon.com/query.html I personally love this site because it has TONS of links for query writing and will even show you winning samples of romance queries.
She also has a great one for a Synopsis: http://www.charlottedillon.com/synopsis.html
Seriously, just browse her site and you'll be sure to find something for you, even though most queries and such are for the romance genre you can easily apply them to your own work.
~Wonderful Writing Communities Online~
www.key-publications-network.socialgo.com I'm head of the YAWR(Young Adult Writers Rock) group there. It is an amazing online critique group for writers. Check it out you won't be disappointed.
http://writersdigest.ning.com/ This is the writer's digest community
www.viciouswriters.com ---> soon to be renamed.
Check em' out. If I'm missing any feel free to post some other helpful sites :]