Soon you'll need a passport to get back in the United States from Mexico and Canada

The good old days of simply saying "I'm a U.S. citizen" to cross the border are over. Now, you need a passport. Well, if you've never gotten one, here's what you do:

If you plan to travel outside the United States -- and re-enter -- you're going to need a passport; a passport is a document that verifies the nationality and identity of its bearer. You'll need two 2x2-inch photos, proof of citizenship, proof of identity, passport application and money. Here's how to obtain a passport.

1. Fill out the Application for Passport, Form DS-11. You can download this form online and bring it with you when you apply for your passport.
2. Get two passport photos taken. The identical photos must be 2 inches by 2 inches. The pictures must offer a full, frontal view of your face, from the top of your head through your shoulders. The photo must be taken with a plain white background. Many post offices, mailing service stores and photographers will take passport photos for a small fee.
3. Bring a previous U.S. passport, certified birth certificate, naturalization certificate or a certificate of citizenship to a Passport Acceptance Facility (often at your local court house or county administration office). You can find the nearest facility by inputting your zip code on the the U.S. Department of State web site (travel.state.gov).
4. Bring proof of identity, such as a current driver's license, or government or military ID.
5. You must pay both a passport application fee (about 67 for adults) and an execution/acceptance fee (about $30) to get your passport. You will pay the fees when you file your application. It takes about six weeks after filing to receive your U.S. passport. If you are traveling soon, you can pay an additional fee for expedited service (about $60 plus delivery) and get your passport within two to three weeks.