Planning ahead can help you avoid unnecessary hassles at check-in. Confirm the travel documents you will need for your destinations and review special international travel information and check your passport expiry date.
Make sure that your passport is valid for at least six months beyond your return dates of travel. Some countries require that your passport be valid for at least six months or you may be refused entry.

When traveling internationally make sure that you have any visas that may be required. Verify if there are business or tourist visas and which one best suits the purpose of your travel.

Do make photocopies of your passport, visas and any other pertinent travel documents. Pack copies in your luggage as well as leaving copies with your workplace, family and/or friends.

Bring a copy of your medical history with you. This could simply involve listing any medical conditions, blood type, etc.

If you are allergic to any medications, include this information. When traveling internationally try to have these items listed in the local language (if possible).

If you are traveling internationally try to have key phrases written in the local language such as "help", or "I need to see a doctor".

The above tips are intended to aid in safer travel for you, and ensuring that you can be reached in case of emergencies or flight changes.