Each and every story is composed of the same five basic elements: a (1) hero who finds himself stuck in a (2) situation from which he wants to free himself by achieving a (3) goal. However, there is a (4) villain who wants to stop him from this, and if he’s successful, will cause the hero to experience a (5) disaster.
Your "blurb" (a description such as you'd find on the back cover or inside flap of a print book) sells your book.
Learn how to write them.
The above snippet gives you a no-fail way to write a quick blurb for your novel.
It's a good way to start plotting your novel too -- at least you start out with the right elements in place. :-)