Make Your Graphics Amazing
It should go without saying, but graphics sell apps. Your app must have impressive graphics. Use graphics to help sell your app. You app icon and your screens must be superb to attract the attention of your buyer. An app with impressive graphics will get noticed, and you’ve only got one shot as someone glances at your app to make a decision about it. Now that the Android market allows you to post more graphics to its store, be sure to use all the slots for posting graphics of your app.
Create a YouTube video as well. Visual aids give the user a realistic perspective of how your app functions and the benefit they will receive by using it.