This is the No. 1 way to be happier, expert says—and it'll only take you 15 minutes

There’s a lot of advice out there about how to increase the amount of joy in your life.

For example, leading happiness researcher and expert Arthur Brooks has 10 tried-and-true ways to be happier, he wrote in his book “The Happiness Files: Insights on Work and Life.”

Gretchen Rubin, happiness expert and author of “The Happiness Project,” offers up 12 secrets to creating a happier life, including practicing self-compassion and embracing failure.

But if you ask Sonja Lyubomirsky, she’ll tell you that the best way to be happier is to “feel more connected to other people.”

Lyubomirsky is a happiness researcher and distinguished professor of psychology at the University of California, Riverside.