"If you're having problems sleeping at night, or if you're feeling too sleepy the next day, take a look at your bedtime habits," says Allison Harvey, PhD, behavioral sleep expert at UC Berkeley. "Create a relaxing wind-down routine and turn down the lights. Make your bedroom a sanctuary from the worries of your day."
Folks who get less than seven hours a night have accelerated aging in the brain, according to a study published this week in the journal Sleep. Their cognitive function is on par with someone who's three to seven years older. Surprisingly, getting too much sleep -- more than nine hours a night -- also appears to be linked to speeding the brain's aging process.