I was going to post this question tomorrow, but there's no time like the present!

So, how does one go about finding a reputable agent? I've checked out a few websites, but am hesitant to begin querying.
I really have no idea what to look for in an agent, so I'd never know or not if I'd hired a hack!

A suggestion that Writer's Digest had was to research the authors of the same genre of book you are writing and find out who their agents are, but very few books have that info listed in the jacket. And I haven't really checked out the Writer's Market thoroughly -- does anyone know if this is still considered a good resource?
Although I am proudly Canadian, I think I'd prefer to publish in an American market. Perhaps some of you have opinions on this as well. In the couple of publishing workshops I've taken, they all said the New York Market is "where it's at".
Would this mean I need an American agent? Would they or wouldn't they be better connected?
Truthfully, I would feel so much more comfortable getting a recommendation from someone I knew or someone in the business -- but wouldn't everyone?
Any suggestions would be greatly appreciated.
Ramona.