However, exercising or intense conversations tend to occupy the moment and keep us from daydreaming. They believe this is one reason people are so interested in sports, clubs and opportunities to congregate with friends.

However, findings show that a wandering mind isn't necessarily a happy one. Psychologists believe that people are happiest living in the moment and not dwelling on the past (Richard Alleyne, "Why Our Wandering Minds Are Making Us Miserable," Telegraph.co.uk, Nov. 11, 2010).