This document provides tips for developing successful apps and using social media for app marketing. It recommends focusing an app on either usefulness or entertainment, choosing a consistent brand identity, and using social media platforms like Twitter, Facebook, LinkedIn and Meetup to promote the app. Game Center is highlighted as a new opportunity on iOS 4 for social gaming. Tracking social media efforts is advised to evaluate their effectiveness. Developing quality apps that meet real needs and utilizing social media is key to standing out in the crowded app marketplace.