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Leading happiness researcher Sonja Lyubomirsky writes that happiness involves feeling positive emotions along with “a sense that one’s life is good, meaningful, and worthwhile.” Some research even suggests that trying to be happy all the time is a recipe for unhappiness.

Studies suggest that happiness reduces your risk of heart disease, strengthen your immune system, and might ultimately add years to your life.

Studies suggest that feeling happy makes you kind… and kindness makes you happy—an upward spiral of happiness and goodness.

They deliberately organize their day-to-day life so it contains situations that naturally give rise to positive emotions.

Happy people are more likely to get married and have fulfilling marriages, and they have more friends.

Happy people generally do make more money and are more productive at work, but research suggests that once people earn roughly $75,000 per year, more pay doesn’t bring more happiness.