The article “will explore 10 of the key things to think about when designing your app (and planning the design process)”. Here are the bullet points, but the good bits are the details, examples, and screenshots in the article.

• Take A Goal-Oriented Approach To Simplify Functionality
• Leverage What You Know To Create A Fully Personalized Experience
• Think About The Place Of Use
• Consider Multi-User And Multi-Device Cases
• Don’t Do Crazy Navigation Unless It’s A Game Or One-Hit Wonder
• Provide A Home Page
• Beware Of Awkward Pop-Overs
• Avoid Gratuitous Splash Screens
• Use Gestures In Clever Ways, But Don’t Overdo It
• Make Clear What’s Touchable, And Make It BIG

http://uxdesign.smashingmagazine.com/2012/01/31/ten-things-think-about-designing-ipad-app/