What you eat before bed can have a profound impact on your ability to fall asleep and stay asleep at night. The key is to find foods that help you sleep and healthy bedtime snacks that will not prevent you from getting the sleep you need. Some foods, and portion sizes, interfere with your ability to fall asleep at night. You’ve probably been told not to eat large snacks filled with fried, fatty food right before going to bed. But, what is good to eat?