SLEEP Sleeping better isn't impossible. It just takes some strategy. Solve the Sleep PUZZLE Addressing your sleep saboteurs can benefit your health 18 W IN TER 2019 3 YOU STAY UP TOO LATE. Get to bed early enough to fit in seven or more hours of sleep nightly. And don't stay up late on weekends, banking on sleeping in the next morning. PHOTO BY GETTY IMAGES You're tired all the time. Irritable. You can't concentrate. You know you're not sleeping well, but you don't know what to do. "Sleep is like a puzzle," says Rajkumar "Raj" Dasgupta, MD, a pulmonary, critical care and sleep specialist and spokesman for the American Academy of Sleep Medicine. To sleep well, all the parts of the puzzle need to be in place. With enough high-quality sleep, you should feel better. Good sleep helps memory and cognition and restores energy, Dasgupta says. Here are some common sleep disruptions and tips on how to fix them.