A good way to get people to review your app easily is to put a link to the review page in your app. Easy to do, just add this
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://itunes.apple.com/us/app/a-fine-musician/id406573790?mt=8"]];
and replace “a-fine-musician” with your app name, and “406573790” with your app id.