The best way to gauge whether or not you should eat something before bed is to rate your hunger on a scale from 1-10, explains Davis. If your hunger falls at a five or below, she suggests just having a glass of water and going to bed. If your hunger is a six or higher, she says you should nosh on a satisfying snack, something between 100 and 200 calories. Just make sure you're snacking on one of the best foods to eat before sleep to quiet a rumbly tummy and put you to sleep.