This is an excellent site: Call My Agent! http://callmyagent.blogspot.com/. If agents are a mystery to you (aren’t they always?) then head on over and have a browse.
Agent Sydney says: “Call My Agent! is a blog written by Agent Sydney, an Australian literary agent. Call My Agent! hopes to shed light on the sometimes shadow-shrouded world of publishing in order to help writers work out how the hell they get published.”
It is indeed a great blog. I’ve been reading the query letter dissections with great fascination. I think I’ve learned more from this blog than all the panels I’ve ever attended combined.
I think it’s brilliant advice. Some people in the spec-fic area seem to think it doesn’t apply to them for some reason which is beyond my tiny mind.