What information would be helpful for domestic and international travel?

The company I work for is putting together an information packet for our employees when they travel. What sorts of information do you think would be helpful to have for international as well as domestic travel? Anything that you can think of would be great, some ideas we have are hotel amenities, passport [...]

Can I travel within the domestic US on a foreign passport with an expired VISA?

Specifically, air travel. Do they even bother looking at the VISA for domestic flights?
No US government ID.
credit card jokes are funny, but this is a serious question