Sign your passport and fill in the emergency contact section. If lost, a good Samaritan may return the passport to its rightful owner.
Keep your passport on your person while traveling in any form or transportation, such as a bus, airplane or train. Never keep your passport in your luggage, as luggage is often lost or misplaced.
Make a photocopy of your passport. Keep the photo copy in a safe place separate from where you store your actual passport. Leaving an additional copy with family and friends is a good idea.
Keep your passport separate from other forms of identification, such as a driver's license or credit cards. This will help ensure that you have some form of identification available should you lose your passport.
Store you passport in a hotel room safe once you reach your country of destination. Never carry your passport unnecessarily through cities or towns, as it will be more likely to get lost or stolen.