How many hours of sleep you need depends on a few factors. If you are a hard-working person, then you may need more rest than an individual who is retired and does not work at all. Not everyone needs eight hours of sleep per day to feel good. Some people need more while other claim that they feel better when they get only 5 hours of sleep. You can change your sleeping patterns if you feel that might change the quality of your life. But trying to sleep no less than eight hours a night is not an absolute must at all.