Snap out of it! That daydream you're having about eloping to the Bahamas with Johnny Depp or Angelina Jolie is leaching away your happiness. In a new global study, researchers used iPhones to gauge the mental state of more than 2000 volunteers several times a day—even when they were having sex.
The results indicate that, if you want to stay cheerful, you're better off focusing on the present, no matter how unpleasant it is. The human mind is remarkably good at straying from the moment. That ability allows us to remember the past, plan for the future, and "even imagine things that never occur at all," says Matthew Killingsworth, a doctoral student in psychology at Harvard University.
But is daydreaming good for us?