The range of things that can make us joyful or distressed is simply vast. Is there any pattern underlying this bewildering diversity? ‘How to be happy’ explores what makes us happy by considering some of the main findings in contemporary research on the psychology of positive emotions and happiness. It discusses the ‘technologies of mood’ that promise to provide us with short cuts to happiness, from psychotherapy and art to drugs and meditation. It asks whether or not they work and discusses the dangers that beset some of these attempts to circumvent the more circuitous path to happiness that natural selection laid out for us.