Sleep can be a wonderful experience but it can also cause great frustration. If you think you're not getting your best sleep, you're not alone. "I kind of think that society is chronically sleep deprived," says Mark Muehlbach clinical director at the Clayton Sleep Institute. "People should make sleep a priority and understand the importance of sleep." You can start on the path to bettering your sleep understanding and leaving the ranks of the deprived by first getting familiar with what each stage of sleep means for your body.