Research by Christopher Hsee and colleagues shows that you are happier when you are busy. This is somewhat of a paradox. In another post I write about the research that shows that people are actually lazy. Unless people have a reason for being active, they choose to do nothing, thereby conserving energy. But doing nothing makes people impatient and unhappy.

https://www.blog.theteamw.com/2011/03/03/100-things-you-should-know-about-people-70-people-are-happier-busy-and-with-a-challenge-2/