In the 1960s, a group of Stanford professors developed a method of problem-solving that’s come to be know as design thinking. The approach has been used for years at companies like Apple and Google to develop new products. Two Silicon Valley veterans thought these same principles could be applied to tough life questions like “what do I want to be when I grow up?” And “how do I live meaningfully?” They turned their idea into a class called “designing your life”—now wildly popular at Stanford. In a new book, they describe their method and say it can be used at any age. Bill Burnett and Dave Evans on how to use design theory to answer questions about work, life and happiness.