By Dr. Meagan Knowles | Psychologist Sleep is a necessary part of our mental and physical well-being. Yet, almost 40 million Americans suffer from sleep disorders each year. Though everyone’s sleep needs vary, the average amount of sleep a person should get depends on their age. Many Americans report getting an average of six hours of sleep per night, indicating sleep deprivation. Research has shown that it is not only the quantity of sleep that is important, but the quality.