If you're traveling to a foreign country, it's probably a good idea to have that country's currency in your pocket. Check out this site to figure out how much your dollar is worth. You can also compare other countries' currencies against each other, or against the Euro.

Quick! You want to buy a souvenir that costs €23. How much is that in U.S. Dollars? Is it a good deal? Print out a cheat sheet that fits in your wallet so you can easily compare currencies while abroad and not sitting at a computer.

Instead of going to a bank, you can order your foreign currency on-line.