Don't worry. There are only a few cultural habits that might get you killed; most of them involve driving, so it's a lot safer not to do it at all. Another is looking the wrong way when stepping off the curb/kerb. You're used to looking left first; you've got to learn to look right. The rest you can learn as you go along, and you will have fun doing it.

On the whole, Brits seem to know a lot more about American culture than Americans know about British culture. I suppose it's because they've seen so many American movies and TV programs. Even when you don't understand them, they will probably understand you. If you make a mistake, they will make allowances.

Here ya go. Happy browsing.

BS: British/American cultural differences.
BS: British/American cultural differences 2.
BS: British/American cultural differences 3.
American Cultural oddities.
Cultural curriosities II.
What is it with the English?.
BS: No such thing as British... .
BS: Great British Pubs.
BS: American vs British slang.
BS: USA vs British rude & other gestures....
BS: British vs. American names.
BS: Explain the British system of Government.