After the sun sets, many people say they need to get their beauty sleep as an excuse for heading to bed early. This phrase usually elicits a chuckle, but a good night’s sleep really can help us look our best. Plus, it’s free, takes no effort, and can be done from the comfort of your own bed.  “In addition to positively impacting a person’s mood and focus, consistent quality sleep can contribute to a person’s physical appearance,” said Dr. Clarisse Glen,a doctor of pulmonary medicine with Kaiser Permanente at Sacramento Medical Center. She diagnoses and treats underlying causes of sleep discomfort and sleep disorders and advises patients about the link between cosmetic factors and a good night’s sleep. “The science behind the term ‘beauty sleep’ is not a myth,” she added.Although it’s not always easy to get a good night’s sleep, it’s “one of the simplest yet most effective ways to improve your skin’s appearance,” said Dr. Hannah Kopelman, a