One of the easiest ways to feel like your world is safe and friendly is to talk to a stranger. It can be someone in line at the store, a cashier, or the person next to you on the bus. A study found that public transit commuters who were asked to talk to strangers reported a more pleasant ride than those who kept to themselves. Another study found a link between happiness and interacting with people beyond our usual circle of friends and family. Want some recommendations on how to start a casual conversation? Read our full article.