Americans are leaving the U.S. in record numbers and spending hundreds to learn how to do it - CNBC

[Old Crank]

29. Good advice

If you are near or retired the rules usually change.
Research the tax system. The country and the US will have a tax treaty. That determines how your income will be taxed. In Europe, generally, the tax rate is higher and goes up faster. If you can withdraw savings from a US tax advantaged account without penalty, it may be in your best interests to do so. Part or all of your stash.
If you can get a headstart on the country's language, do it. If you can, find a country American group. Many will speak the language and might help. Perhaps able to give tips on the culture also.