Although it is widely accepted that sleep is an essential element to good health, it is unclear the exact amount of sleep we need. Generally speaking, the younger we are and the more we are growing, the more sleep we need. Children need around 11 hours of sleep per night, teenagers need at minimum 8.5 hours of sleep per night, and even adults still need 7.5-9 hours of sleep. These numbers are a helpful start to ensuring you are getting enough rest but sleep is more a matter of quality, not quantity. Nine hours of tossing and turning will likely leave you feeling worse in the morning than five hours of deep sleep. Although there is no surefire way to ensure a perfect night’s sleep, there are several things to avoid and to try for falling asleep and staying asleep.