By Julie Shepherd
Sleep, good-old-fashioned sleep. Can you remember the last night you had a really good sleep? Your head hit the pillow and you didn’t wake up until the next morning. You got out of bed with a smile on your face, full of energy, eager to start the day. Now compare it to a night when you hit the pillow, tossed and turned, eyes wide open, and barely got any sleep. How did your mood compare? Maybe no smile, maybe grumpy wishing you could go back to sleep.