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Grab some cherries. Tart cherries naturally boost melatonin levels, according to research from the universities of Pennsylvania and Rochester. Eat them fresh or dried or have a small glass of cherry juice.
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Think tryptophan. The brain uses this amino acid to make serotonin and melatonin, substances that promote sleep. Foods high in tryptophan are protein-rich items such as dairy products, seafood, meat, poultry, whole grains, beans, lentils, peanuts, eggs and sesame seeds.
Combine protein with carbohydrates. Complex carbohydrates allow more tryptophan to enter the brain, while protein-rich foods alone may interfere with sleep because they contain another amino acid that perks up the brain. Some smart combinations: peanut butter or grilled chicken on whole-wheat bread or hummus on whole-grain pita slices.
http://www.healthzone.ca/health/dietfitness/diet/article/933490--best-foods-to-help-you-sleep