Bedtime worry. Staring at the ceiling. Watching the clock tick away hour after hour. Tired but unable to fall asleep. Ever been there? You're not alone. Gallup research has revealed that the time Americans spend sleeping has been steadily declining for the past 70 years. While only 3 percent of our grandparents and great-grandparents reported sleeping less than five hours per night in 1940, today that number has shot up to 14 percent in 2013. It's perhaps no surprise t