In The Daily Stat from the Harvard Business Review, a recent study suggests that having at least one member of your team in a good mood will allow them to perform better:
Three-member teams on which at least 1 person was in a good mood were more than twice as likely to collectively solve a murder-mystery puzzle as teams on which all members were in neutral moods, according to an experiment by Kyle J. Emich of Fordham University. That’s because people in good moods are more likely to seek information from others and to share their own knowledge. So if you start a meeting with a funny story or do something else to put people in a good mood, you may get better exchange of information and better decision making, Emich suggests.
Check out the article and the HBR blog network when you get a chance!