In sleep surveys, 90 million Americans admit that they snore. And that racket is more than just an annoyance for their bedmates. Snoring weakens your immunity by as much as 25 percent -- it sabotages your ability to stay in the deepest stages of slumber, which is when your body manufactures new white blood cells, say Cornell researchers. To dial down the (snoring) volume, try singing with gusto for 20 minutes daily. Snoring is often triggered by lax muscles in the soft palate and throat -- when these tissues collapse during sleep, the air flowing past them vibrates, producing that tell-tale racket. But in a preliminary study at Britain’s University of Exeter, daily singing sessions helped tone up those muscles, reducing the frequency (and volume) of participants' snoring in just three months. The good news: You don’t have to be a good singer to benefit!