You're probably getting less sleep than you should be. Many people are more chronically sleep-deprived than they realize, and the punishments for this are severe – reduced productivity and happiness, and increased risk of a panel of diseases. Why We Sleep discusses how sleep happens, its major benefits, and the best ways to get better sleep.Don't fall for the trap of thinking that sleeping less means you get less time during the day. Invest in better sleep, and you'll be more productive in the hours that you're awake.