Research shows that feeling joy at work not only increases our wellbeing, but also our performance across the spectrum. Joy increases our working memory and cognitive flexibility, which in turn leads to better problem-solving. Take doctors, for example: Those who have been primed to feel joyful make a correct diagnosis earlier than those in a neutral mindset. Joyful businesspeople consider a wider range of scenarios and make more accurate decisions. Joyful negotiators are more likely to achieve win-win agreements. And it turns out it’s infectious: Joyful leaders spread positivity to their teams, increasing rates of effort and cooperation; and when salespeople exhibit joy, customers respond by spending more time in a store, giving higher satisfaction ratings, and expressing a greater likelihood to return.