Read original post at Jim O'Neil's Blog
Successful apps are sticky; they make us want to come back again and again, whether it’s to check in on Foursquare, send a Tweet, or get a quick answer from ChaCha. Of all the types of apps, games can be the stickiest – Angry Birds anyone? or in my case Wordament! A great idea and implementation are obvious ingredients for success, but you also want to capitalize on opportunities to get your users re-engaged when they aren’t running your app or game.