The Gift of Unhappiness

This is very interesting. My friends and I recently were talking about what makes some people happy and others unhappy. Research shows that it isn't about money, whether or not you are married, whether or not you have kids, etc. Some people are just happy. One friend said she tries to focus on looking at the positives in her life -- her blessings, her accomplishments -- instead of focusing so much on the negatives. She purposefully made this switch a few years ago and she said it has really helped. Anybody else have any suggestions for how to be happier?