Is there such thing as a guide to happiness? Here are some simple changes that could transform your life. Aristotle said that happiness is the meaning and the purpose of life, the whole aim and end of human existence. Today, examples of just how important happiness is to us are apparent across the world. In Bhutan a happiness index is used to measure national progress, in America the pursuit of happiness is a fundamental right protected by the Declaration of Independence, and in Denmark the government places more emphasis on social capital than generating wealth, contributing to the country’s enviable position as the happiest country in the world. But the unintended consequence of all this focus on happiness is that we become hyper aware about whether we’re happy or not, which paradoxically can make us sad that we aren’t happier. For millennials, who are particularly plugged into this global obsession through social media channels, the problem can be particularly acute. So just how do we cut through all the chatter and get down to the...