The Happiness Advantage by Shawn Achor shows us how to rewire our brains for positivity and optimism to reap the happiness advantage in our lives, our careers, and even our health.

How small shifts in our mindset and habits can produce big gains at work, at home, and elsewhere. Happiness is not the belief that we don't need to change; it is the realization that we can. Our most commonly held formula for success is broken. Conventional wisdom holds that once we succeed, we'll be happy; that once we get that great job, win that next promotion, and lose those five pounds, happiness will follow. But science reveals this formula to be backward: Happiness fuels success, not the other way around.

Habits are like financial capital – forming one today is an investment that will automatically give out returns for years to come.
― Shawn Achor