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Read more about the 'Power 9' in an excerpt from 'The Blue Zones of Happiness'

Looking for more happiness in your life?
/ Source: TODAY

Looking for more happiness in your life?

National Geographic

Read what author Dan Buettner calls the "Power 9," the nine main keys to happiness, in an excerpt from his book "The Blue Zones of Happiness: Lessons from the World's Happiest People." Find the excerpt here.