Sleeping well directly affects your mental and physical health. Fall short and it can take a serious toll on your daytime energy, productivity, emotional balance, and even your weight. Yet many of us regularly toss and turn at night, struggling to get the sleep we need. Getting a good night’s sleep may seem like an impossible goal when you’re wide awake at 3 a.m., but you have much more control over the quality of your sleep than you probably realize.