Leading contemporary behavioral scientist Hal Hershfield reveals how our relationship to time influences choices in the present and how to make good decisions for a happy future. Each of us has several future selves that are different from us at the moment, and understanding this will help us make more informed decisions for our happy future today. The book presents the author's personal perspective and the results of recent scientific research, many of which Hal Hershfield, the most popular professor at UCLA's Andersen School, conducted himself. Hal's research on "time travel" drew widespread attention and was supported by companies including Fidelity, Prudential, Morgan Stanley and LinkedIn. Hal developed one important idea at the intersection of psychology and marketing: we're not just the "one me" in our lives, but we have many "future selves," each different from who we are today. And how we feel about our "future selves" significantly affects the decisions we make today about our future wellbeing.