Sleep Hygiene Assessment: Do You Get Good Sleep?

Harvard Medical Center: "Twelve Simple Steps to Improve Your Sleep."

National Sleep Foundation: “Shift Work and Sleep," "Sleep Hygiene," "The Sleep Environment."

Harvard Medical School, Division of Sleep Medicine: "Get the Sleep You Need," "Sleep and Health."

Harvard Health Publications: "Losing Weight and Belly Fat Improves Sleep," "Not Sleeping Well? There May Be a Medical Cause.”

Hubbling, A.BMC Complementary and Alternative Medicine, February 2014.

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Mayo Clinic: "Does exercise late in the day cause insomnia?" "Foods and Sleep," "Insomnia."

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Kline, C. Sleep, 2013.

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Rubin Naiman, PhD, clinical assistant professor of medicine, Arizona Center for Integrative Medicine, University of Arizona, Tucson.

Simon Rego, PsyD, director of psychology training, Montefiore Medical Center/Albert Einstein College of Medicine, New York.

University of Maryland Medical Center: "Sleep Hygiene."

Susan Zafarlotfi, PhD, clinical director, Institute for Sleep and Wake Disorders, Hackensack University Medical Center, New Jersey.