Well, my main advice is to exercise during the day.... as simple as taking a walk around your neighborhood.
Others tips I've heard....
- Drink a glass of warm milk (milk contains an amino acid that is converted to a sleep-enhancing compound in the brain).
- Take a warm (NOT HOT) bath (not a shower) before going to bed.
- Avoid naps if they interfere with your normal sleep pattern.
- If unable to fall asleep within 20-30 minutes of lying down, get up and do something else until you feel sleepy. This way your body does not associate your bed with wakefulness.
- Avoid eating a large, late-evening meal - and heavy, fatty foods before going to bed.
- Avoid coffee, tea, and other sources of caffeine, especially in the evening.
Hope that helps!