 You're listening to All Things Considered from NPR News. A full night's sleep is a wonderful thing. It improves our memory and brain performance, enhances our physical health, and makes us more attentive to the people around us. Well, even if you know all that, actually getting enough can be tricky. So to help you sleep better, longer, and more deeply, NPR's Life Kit has created a special newsletter series, and NPR's Claire Marie Schneider has a few tips.