Chip and PIN, a security feature used on all European credit cards, as well as Mexico, Brazil, and Japan, continue to cause trouble for American travelers. No, not the chip and pin itself, but the lack of this technology on U.S. credit cards.

When you’re traveling, it’s a good idea to keep a small first-aid kit on hand for unexpected emergencies. There are plenty of ready-made kits available, but here's how to put together your own on the cheap.