Get some sleep!

Sleeping six hours or fewer a night makes you much more likely to get sick, a study out of UC San Francisco finds.

Researchers determined that, compared with people who get seven or more hours of sleep, those who don't get good rest were four times more likely to catch a cold when exposed to the virus via nasal drops, according to SFGate.com. “It didn't matter how old people were, their stress levels, their race, education or income,” said Aric Prather, lead author of the study. “It didn't matter if they were a smoker.”

Though there is a growing body of evidence connecting regular sleep to overall health and disease prevention, this study is believed to be the first to objectively measure sleep habits and link them to illness.