I've lately submitted a new app for windows phone that is called 'Baby Toy'.
Many people have downloaded the app but no reviews has been given. Anyway, if you have a baby(up to 2.5 years old), I'de like to ask you to try it out and let me know your thoughts.
you should put a reminder in your app to ask users to review after they use it a few times. Users will only go out of their way to review an app when they have a bad experience.