Study: Doing Good Makes You Feel Good

Brightening up your office or room with extra light could make you more alert and keep the afternoon energy slump at bay. People exposed people to bright white light were more awake and had increased activity in brain regions involved in alertness and some cognitive processes. To fight off nighttime drowsiness, scientists suggest blue light could do the trick. But missing out on sleep can backfire, since shut-eye could help your brain seal in what you learned during the day.

There's a new incentive to doing good things for others: It makes you happier, according to a new study.

Michael Steger, a psychologist at the University of Louisville in Kentucky, has always been amazed by how differently people lead their lives. Pat Tillman, for example, left the NFL to enlist in the Army and fight in Iraq and later Afghanistan (where he was killed), Steger said, but celebrity and socialite Paris Hilton continually pursues “a public life of shallowness.”

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