Three things you can try right now:
If you are having trouble sleeping, the following tips might help:
Drink a glass of warm milk. It turns out there’s a scientific basis for your grandmother’s old-time remedy. Milk contains tryptophan, a chemical that may promote sleep in some people.
Have a light snack, but only if you’re hungry. Going to bed hungry can affect your sleep. High-carbohydrate snacks, such as crackers, pretzels, or a plain bagel, are good bedtime snacks. But be careful not to overeat; indigestion can interrupt sleep.
Stay out of bed until you feel tired enough to go to sleep. Whenever you’ve been lying in bed for 20 minutes and can’t fall asleep, go into another room and do something relaxing, such as reading a book. Return to bed only when you’re sleepy.