Researchers developed a smartphone technology to sample people’s ongoing thoughts, feelings, and actions and found

  • (i) that people are thinking about what is not happening almost as often as they are thinking about what is and
  • (ii) found that doing so typically makes them unhappy.

source: “A Wandering Mind Is an Unhappy Mind” Matthew A. Killingsworth*, Daniel T. Gilbert Science 12 Nov 2010: Vol. 330, Issue 6006, pp. 932