What is the value of a good night’s sleep? You probably recognize how precious sleep is if you have had trouble falling or staying asleep, or you wake up without feeling rested. Lack of sleep can leave you feeling worn-down, listless, unable to focus, and too tired to work out. Plus, lying awake at night or waking up frequently is no fun, either. By the way, did you know that inadequate sleep raises your risk of weight gain and diabetes? If prescription or over-the-counter medications feel a…