Every year millions of people travel to foreign countries, many of them by plane. If you choose the plane, you should get well-prepared.

Condé Nast Traveler gives you 14 tips you should know before you leave!

1. Break out those reading glasses
Inform yourself about the visa requirements, local laws, customs and medical systems in the country that you’re going to visit.

2. Flip through your passport
Make sure your passport is up-to-date. All passports should be valid for up to six months from your exit date in the country and should have at least two blank pages.

Important: Copy the page that has your photo and full name on it, and keep these copies in separate places. Leave one copy of your passport at home, with coworkers if on a work trip.

3. Get a visa – if you need one
The Passport Index gives you information about visa requirements.

4. Research travel warnings or travel alerts
Examples of reasons for issuing an alert might include an election season that could mean strikes, demonstrations, or disturbances; a health alert like an outbreak of H1N1; or evidence of an elevated risk of terrorist attacks.

Travel warnings are a broad-reaching caution and may stem from unstable governance, extenuating circumstances, frequent violence and terrorist attacks, or civil war.

Check out the other 10 tips on www.cntraveler.com!