Sleep takes up a quarter to a third of our lives, meaning that by the time you're 60, you'll have spent a total of 15 to 20 years sleeping. However, sleep is a must, not just for immediate comfort but for overall health, both physical and mental. Nearly one-third of the population suffers from sleep deprivation or poor sleep at some point in their lives. But everyone can do something to improve their sleep by following a few simple rules. Just take action and make progress.