" Meditate. Neuroscientists have found that monks who spend years meditating actually grow their left prefrontal cortex, the part of the brain most responsible for feeling happy. But don’t worry, you don’t have to spend years in sequestered, celibate silence to experience a boost. Take just five minutes each day to watch your breath go in and out. "

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