Sleep can enhance your creativity, lift your spirits, improve your sense of humor, and amplify your sociability. So why do so many of us struggle to get a good night's rest? Russell Foster, a professor of circadian neuroscience at the University of Oxford, says it's because we've let the frantic drumbeat of modern life drown out the steady tick-tock of our biological clocks. That's the bad news. The good news is that Russell's here to share science-backed tips that will have you catching more z's in no time.

Russell's new book is "Life Time: Your Body Clock and Its Essential Roles in Good Health and Sleep."

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