Growth Hacking Apps: One Indie Developer’s Success Story
blog.tapstream.com
blog.tapstream.com
Going to give adwords another shot.
You probably already know, but for the benefit of everyone else: if you're advertising an app, when you create a new ad, make sure to select "App / digital content ad" and then "App promotion ad". It will do all of the OS targeting for you and pull in your app icon, name, and URL automatically.