[header] How to deal with teenage insomnia [title] Don't drink things containing caffeine (coke, coffee, tea) at least three hours before you go to bed. [step] If possible, cut out caffeine as much as possible, like drinking decaf tea. [title] Don't go to bed hungry, but don't stuff yourself. 
[step] Have your evening meal at least three hours before bed and have supper if you are hungry. [title] Make sure the bedroom is dark when you go to sleep and light during the day.