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India

"Every morning, I do a laughter exercise—I smile, wave my hands, and jump. The more I do it, the more vital I feel." —Rashmi Vyas Aparajit, 45, health program director; Mumbai

What you can do: Yuk it up! The contracting stomach muscles trigger a surge of feel-good endorphins, according to a study from Oxford University. Even a couple of minutes of belly laughter can be calming—a good reminder to tape your favorite late-night show and actually watch it.

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