Gee, talk about a loaded question! LOL! Well, as far as these boards are concerned, you should check out the "Beware & Backgrounds" forum and wander through the Sticky Notes. In there, you'll find discussions about any number of agents -- good and bad. (Don't presume that everything in there is negative information, because it's not. Some agents get rave reviews.)
Since you're just starting out, I'd recommend Writer's Market, which is a book you can find in any bookstore (or at least can be ordered.) Writer's Market has a lot of detail about agents with the genres they represent, submission guidelines and the like. You can also visit the Association of Author's Representatives (
http://www.aar-online.com ) Members of this organization have agreed not to charge any upfront fees to their clients, and abide by a set of ethical guidelines. Now, there are plenty of agents who aren't members of AAR who are good upstanding agents, so it's not the be-all, end-all on whether or not they're a member. But many are. You can also check out Agent Query (
http://www.agentquery.com) You can select your genre and it will give you a list, and there are discussion areas where you can find out about them.
It's trial and error mostly. But don't presume that because you're just starting out as a writer that you CAN'T get a top-notch agent. It's simply not true. If the manuscript is terrific, agents will want to represent it, whether or not you have previous credits.
Good luck!
