Handy hints to mail packages overseas.
This post used to have a long description of how to mail things using the US Post Office forms. Since then, I’ve discovered Pirateship, which sells you USPS and UPS charges and labels and does all the work of preparing the customs labels. They also have a third option which they call the “Simple Export Rate.” The rates are also dramatically lower than paying retail price at the USPS or UPS websites. It also works domestically, with equally big discounts.
Highly recommended.