I'm a talking book if you want to take me!
Apart from that, it's a good idea to have a read through FAR AIMS which is the official guide to US flying. Don't leave it to the last minute though, it's comparable to the book War and Peace! It's really not that difficult to fly in the USA and ATC are really ace people who are really patient with foreign pilots - yes that's you and me!. It's also an idea to have a transciever with you so that you can listen to the tower and ATC in general before flying. The RT is a bit different and GA and commercial fly in the same airspace.