Make a Gratitude Adjustment

When individuals start a daily gratitude journal, they begin to feel a greater sense of connectedness to the world. "The differences are noticed by others," Emmons says. "People who know them say they're more helpful." Thankfulness may launch a happy cycle in which rich friendships bring joy, which gives you more to be grateful for, which fortifies your friendships once again.

Even a simple "thank you" spurs people to act in compassionate ways they might not otherwise consider. People thanked for giving directions help more willingly in the future, social workers who get thank-you letters visit their clients more often, and diners whose waiters write "thanks" on the check give bigger tips.

Call it corny, but gratitude just may be the glue that holds society together.