If you’re keen to discover exactly what a literary agent does, take a look at Andrew Lownie’s website.
He’s a fabulous agent and has written several very candid articles about his work, in which he discusses his reasons for rejecting submissions, details his daily routines, and reveals his submissions statistics. It’s funny as well as informative: I laughed out loud as I read his descriptions of his slush pile. He regularly invites other publishing professionals to contribute (although quite what he was thinking of when he requested this piece I cannot imagine); and if you subscribe to his newsletter you don’t even have to visit his website to read all of this wondrous information as he’ll send it straight to your inbox.
Just remember to come back here when you’re done with him, because I do want you back.