When you start laughing, your chemistry changes, your physiology changes, your chances to experience happiness are much greater. Hasya Yoga (Laughter Yoga) is a form of yoga based on cultivating your childlike playfulness; all of us have a child inside us wanting to laugh and play. Laughter Yoga relieves stress, boosts immunity, fights depression, and eventually makes people into more positive thinkers.
The big question is: How do you laugh when nothing's funny? Just open your mouth into a wide smile and force the breath out. You may feel silly at first, but when you're in a community of laughing yogis, the make-believe version often transforms into the real thing!
A typical Laughter Yoga session involves some warm-up clapping and chanting ("ho, ho, ha, ha, ha"), 15 to 20 minutes of laughter exercises interspersed with deep breathing, and then 15 to 20 minutes of laughter meditation.