Please note your passport must be valid for at least 6 months following the trip return date. If you don’t already have a current U.S. passport, you may obtain one by picking up the forms at certain branches of the U.S. Post Office or go online to http://travel.state.gov/passport. Passports typically take six weeks to process.
If you need to get one quicker, consider paying for a service like http://www.rushmypassport.com. Photocopy all your important documents and keep them in a hidden place separate from the originals. Leave another copy at home with someone you can easily get in contact with while you are abroad.
Items you will need for your passport application