Any advice of how to fall asleep?

When you work hard all day, you get good sleep. i.e. go running or walking during the evening sometime after work and school.

Also trying reading a book when your laying down.

It would also help if you take a nice hot bath before bed. :)

Read the bible.

My nutritionist at the health spa recommended to me a vitamin that helps me to sleep soundly and wake up
super refreshed. It's called Cal-Mag. Calcium Magnesium. I get a small dosage bottle at CVS or Walgreens and start out by cutting one in half and drinking it with water before I begin to get ready for bed. Cutting it in half is just my way of being cautious, and yes I have at times taken 1 full tablet, but never more than one.
It brings on a comfortable sleep and I may wake up in the same position I went to sleep in, that's how relaxed you'll be, but when you wake up, you will be wide awake with no sluggishness. It's great.
Another vitamin you could try is Valerian Root. Small caution, this one smells terrible but will make you drowsy. Look them up on the web, and ask questions of your teachers and doctors about them. Let your parents know if you are going to try them. Cal-Mag is great for sleep.