Prevent a stroke - 4

Hold Your Breath

At least when you're around a smoker. University of Auckland researchers found that people exposed to secondhand smoke are 82 percent more likely to suffer a stroke than those who never inhale.

It seems that carbon monoxide promotes clot formation by interfering with nitric oxide, a biochemical that relaxes blood vessels. "To get rid of every single bit of carbon monoxide after a night at the bar, you'd have to breathe fresh air for about 8 hours. But most of the carbon monoxide will be gone from your body in the first hour," says Laurence Fechter, Ph.D., a professor of toxicology at the University of Oklahoma.

So on your way home, make sure you roll down the car windows and start sucking in some clean air

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