Sleep is one of life’s ultimate paradoxes. For those who have never had sleep problems, sleep is quite literally a dream. It arrives effortlessly, recharges the body, and replenishes the mind. After eight hours of sweet slumber, the mind can go from weary and haggard to refreshed and ready to dominate a new day. And to all you sleeping sweetly at night, we with insomnia say, “Screw you.” Because for people who have experienced sleep...