If possible, include keywords that describe your story in the title. This will help it appear in more searches. If you have a great title that doesn’t include them, you can always cheat a little and add a subtitle.
Make sure the categories you can include in various places are accurate as well. The more accurately you can place your book in one of them, the more likely it will show up there as well. The BISAC codes are especially important since they are what librarians and other book professionals depend upon. You can find a complete listing here. You can sign up for free to get more information.