If you are at all serious about writing and getting your work published you are going to have to write a query letter. For those of you who don't know, a query letter is a nice letter you send to an editor/publisher telling them a little bit about your book in order to get them excited enough to ask to see your manuscript in its entirety.
When you have written and polished your novel to perfection it's time to write a query letter. They are incredibly hard to write and require a huge about of work, and so they should. After all, it isn't going to matter how wonderful your novel is, if your query letter sucks you are never going to sell it!
Where am I going with this? No, I'm not going to tell you how to write a query letter. What I am going to do is point you in the direction of The Public Query Slushpile over at: http://openquery.blogspot.com
Here you can submit your query letter and have others comment, critique and give you brilliant advice.