Sleep is not option, we know that for sure. But there are many things about sleep that we don’t know, like why we dream and what those dreams mean. Sleep remains one of the great scientific mysteries, and doctors and other researchers continually perform experiments in hope’s to figure out the reason why. We do know that sleep is a state that is characterized by changes in brain wave activity, breathing, heart rate, body temperature, and other physiological functions. Sleep is a series of stages divided into two major states, rapid eye movement (REM) sleep and non-rapid eye movement (Non-REM) sleep. The average adult requires roughly 7.5 hours, but there are those who can function on 5 or 6, as well as those who need 9 or 10. While the amount we need varies, one constant remains: we must sleep better, as we all need it to survive. Good sleep strategies are essential to deep, restorative sleep you can count on, night after night. By learning to avoid common enemies of sleep and trying out a variety of healthy sleep-promoting techniques, you can discover your personal prescription to a good night’s rest. The key is to experiment. What works for some might not work as well for others. It’s important to find the sleep strategies that work best for you. The first step to improving the quality of your rest is finding out how much sleep you need. How much sleep is enough? While sleep requirements vary slightly from person to person, most healthy adults need at least 8 hours of sleep each night to function at their best.