1 GLASS OF WINE
It's called a "nightcap" for a reason--a glass of wine really does take the edge off. University of Toronto researchers discovered that one alcoholic drink caused people's blood vessels to relax--but two began to reverse the effects, so limit your intake. Relaxed blood vessels means lower blood pressure, slower heart rate, and greater ability to relax in general.

A 4-OZ GLASS OF UNSWEETENED CHERRY JUICE
Cherry juice has serotonin-inducing carbohydrates, which will help relax you. Down the cherry juice an hour before bedtime, in case you feel a small jolt of energy from the sugar. There's not enough to keep you up all night or destabilize your blood sugar levels.