4. Honey -- Drizzle a little in your warm milk or herb tea. Lots of sugar is stimulating, but a little glucose tells your brain to turn off orexin, a recently discovered neurotransmitter that's linked to alertness.
5. Potatoes -- A small baked spud won't overwhelm your gastrointestinal tract as it clears away acids that can interfere with yawn-inducing tryptophan. To up the soothing effect, mash the potato with warm milk.
And how about a recipe that uses several of the above sleep inducers?