If someone asked us if we want to be happy, most of us would say yes. But we are lousy predictors of what will actually make us happy. Many of us hold our happiness hostage to some future circumstances: «I'll be happy when I get a job, when I lose weight, when my kids shape up, when I meet the right person…» But happiness is, as they say, an inside job. Happiness is not a destination, not something to be pursued. It is the way we live. Happiness is a choice we make every moment, and each...