These are foods high in the sleep-inducing amino acid tryptophan:
Dairy products: cottage cheese, cheese, milk
Soy products: soy milk, tofu, soybean nuts
Seafood
Meats
Poultry
Whole grains
Beans
Rice
Hummus
Lentils
Hazelnuts, Peanuts
Eggs
Sesame seeds, sunflower seeds