Love your app.

If your users are going to open your app, love your app, crave your app, the invisible, underlying processes must be flawless. Start by carefully thinking through the ways users will interact with your iPhone app, the tasks they should be able to do, the menus they will pass through to complete these specific actions. Flowcharts may not be sexy (though we know a people who might disagree) but they are essential to creating a seamless final product.