Get a passport. Soon passports will be mandatory for almost all international travel. Keep in mind that processing times have grown so if you need a passport, extra pages or a renewal, don't wait too long. If you have a passport check to see that it is current. It is advisable to have at least six months remaining as this is a requirement that can be enforced in some countries. If you will be traveling in a number of countries be certain that you have available pages. Internet Resource: US Department of State