I'll be going on my first international business trip to London, and I was wondering if anyone had any general advice for a newbie to international travel? I've never left the US as an adult, and I'm hoping that some of more-travelled people can give some pointers. If it matters, I don't work for an international company that has a presence in London, so I'll be pretty much on my own. For example, as far as changing currency, am I better off doing it here or in London (or does it matter?). I assume I'll need some kind of adapter to be able to use my laptop/cell-phone charger in London?