Do you remember the last time you felt a moment of pure joy? It could be the feeling you had when you got a great new job offer, fell in love, finished a marathon or traveled to a beautiful country. According to the authors of the new book, Designing Your Life, these kind of moments can help us in creating a more fulfilling life in the future. Here’s a life hack from those authors to help you use your favorite memories from the past to create fantastic moments in the future