Write up an engaging and suspenseful description of your book by using active voice. If you know how, use some html code to change the font attributes (color, bold, italics). This will help people to stay on your book page and read the description.
Once your book is for sale, setup up an author page through Amazon Author Central. Enter a short bio and link your blog.
In your Amazon profile (what people see when you write reviews) precede your name with “Author” and use your author name. In “About” include information about your book.
Reviews on Amazon are what people use to determine if they will buy your book or not. Ask everyone who has read it for reviews! And don’t despair over those negative ones. Depending on your book content, they might actually strengthen it’s sale-ability.