Do you wake up tired? Most people have to use an alarm clock to wake up, that means something is wrong and the body isn't able to repair the damage done by the previous day, or days. 8 hours is the average but you may require more, especially growing children, pregnant women or if you are sick. You spend a third of you life sleeping and it very much affects your waking hours. See what you need to do to set up your sleeping area to get the maxium benefits from your rest.