" When you write down a list of “three good things” that happened that day, your brain will be forced to scan the last 24 hours for potential positives—things that brought small or large laughs, feelings of accomplishment at work, a strengthened connection with family, a glimmer of hope for the future. In just five minutes a day, this trains the brain to become more skilled at noticing and focusing on possibilities for personal and professional growth, and seizing opportunities to act on them. "

― Shawn Achor , The Happiness Advantage: The Seven Principles of Positive Psychology That Fuel Success and Performance at Work