Happiness research by Harvard professor Daniel Gilbert teaches that most of us aren’t good at predicting how happy we will be in the future. Not only are our predictions based upon current feelings and events, they also flow out of our previous experiences—none of which necessarily explains what will happen, or how we will feel, far into the future. Instead, Gilbert recommends that we study and learn from those who are living the experience we say we want to mimic. Could it be that only the oldest of old living today can offer us clues about living a very long and happy life? That’s exactly what John Leland suggests in his new book, Happiness is a Choice You Make: Lessons from a year among the oldest old. For those of us who see a very long life as a gift we want to embrace, this book is a window into the wisdom of several elders with a great deal to teach.