I spent the last two years working in an ad agency in Europe. Since returning to the States a couple months ago, I've received several requests for advice on working overseas.
To answer some of these questions, and give a little insight to my time abroad, I wrote an ebook, Makin' Ads Abroad.
You can download it here. Even if you have no interest in working abroad, I hope you find something in there you can use. Feel free to pass it on. I'd love to hear feedback - what you like, what you didn't, what you wish I'd included.