So while we might think that the user-friendly world is one of making user-friendly things, the bigger truth is that design doesn’t rely on artifacts. As my collaborator Robert Fabricant likes to say, it relies on our patterns of behavior. All the nuances of designing new products can be reduced to one of two basic strategies: either finding what causes us pain and trying to eliminate it, or reinforcing what we already do with a new object that makes it so easy it becomes second nature. The truest material for making new things isn’t aluminum or carbon fiber. It’s behavior.30
