MEMORY BOOSTER: Computer time

Tired of wondering where you left your keys? A Harvard study suggests that using a computer for fun tasks (like checking Facebook) for an hour a day cuts the risk of cognitive decline by 42 percent, plus revs focus, concentration and memory. The reason? Computer use stimulates the release of the focus-enhancing brain chemical acetylcholine—and if you’re enjoying your time, acetylcholine release is

maximized.