Writing a book is the hard part, except when compared to getting published!  Here’s some tips for finding an agent:

To find potential agents to query, look at similar books that you love.  Check the acknowledgements, which quite often mention the author’s agent by name.

Publishersmarketplace.com, a paid subscription site, shows what agent sold which books.

Your novel synopsis should be  a single page that gives a feeling for both the tone and content of your book.

A reputable agent will never ask you for money up front.

Source or inspiration:  Michelle Wildgen’s class in Advanced Novel at the University of Iowa Summer Writing Festival, 2009