17 Ways to Love Your Life This Summer

Say Hello and Good-Bye

Remember when you were a kid and you used to wave out the window sometimes at other drivers as your parents zoomed by? The revolving-door game is not so different. When entering a shopping center or a busy office building, time your entrance into the door so you are going in as another person is going out—and wave as you both spin in tandem, your lives turning together for 1.2 seconds.