This week’s edition comes from Finland, the country repeatedly crowned the happiest in the world, and the Helsinki Happiness Hacks event introduced people – selected from thousands of applicants across the globe – to Finns willing to share the secrets of their contentment. These include skateboarding, dancing with friends, messy art, walking barefoot, ice cream for breakfast, and of course, a sauna. And we explore how happiness is measured and why a dose of pessimism doesn’t preclude happiness.