Before you start planning your next dream vacation, make sure your passport is up to snuff. Check the expiration date carefully. Many countries do not allow you to visit with a passport that expires within six months of your trip.

For example, Brazil requires your passport to be valid for six months after your tip. For Switzerland, it's three months.

Plus each country has its own rules for whether they calculate that expiration date from the day you enter the country or from the day you leave, so double check with the local embassy or consulate for the current requirements.

[Photo: Flickr | hjl]