| date = 2010-11-15|url=http://www.nytimes.com/2010/11/16/science/16tier.html?_r=1&hp|accessdate=2010-11-16}}</ref> Other psychologists (see Zimbardo's "Time Perspectives" above) say that it is still important to spend time recalling past positive experiences, and building positive expectations for the future.

  | date = 2010-11-15|url=http://www.nytimes.com/2010/11/16/science/16tier.html?_r=1&hp|accessdate=2010-11-16}}</ref> Other psychologists (see Zimbardo's "Time Perspectives" above) say that it is still important to spend time recalling past positive experiences, and building positive expectations for the future.