Friends having coffee

Photo: Thinkstock

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Feeling Generous?
If you can spare a few dollars...
Take your coworker out for coffee. Research shows that spending money on others has a greater impact on your happiness than treating yourself. caveat: The life-is-good surge may not work if you're doing it to impress someone.

If you can't...
Recounting the things you're grateful for—the neighbor who watered your azaleas while you were out of town—makes you happier and healthier than focusing on daily irritations. One study found that people who delivered a letter of thanks for another's kindness reported feeling happier for up to a month.