Any Good Natural Remedies For Sleep?

Ok, so basically I am stuck on a family trip. I have a lot of trouble sleeping and I was wondering if anyone had any suggestions that could help me attain some sleep naturally without taking over the counter medication.

The best option is seeing a doctor so you can be properly diagnosed and treated.
The second best option is taking an over the counter sleeping-pill.
If for any reason none of the above are good for you, perhaps seeing http://insomnia-sleeplessness.blogspot.com/ might help. It addresses the sleeping problem without the use of drugs (It’s free & they don’t sell anything).