I would first put the philosophical basis of our cultures and religions: The Bible, Torah, Koran, and various works from the Eastern Religions of Hinduism, Buddhism, Sikh ,etc (I apologize, I'm not as versed in those).
Then as an American, I would want the Bill of Rights and Declaration of Independence in there as well.
Cell phones would be next (with lots of photos on it)
One actual newspaper (as they are going away soon)
And finally, weapons....AK47s, AR15, and various handguns (probably a Glock 9mm).
I think that encapsulates modern society, the good and the bad.