Really really useful book chock full of easy and thoughtful exercises to help you see the brighter side of life and maintain a consistently sunny mood regardless of life situation and serotonin levels. Highly recommended, especially for people who let life’s little downers get the better of them. Michael Neill also has a website where you can sign up for a really helpful and informative weekly email filled with wisdom and great exercises to help you realise what you want, and go out and get it.