My wife and I always carry different credit cards. I also make a list of all credit card company's international phone numbers-they are collect!

On a sheet of paper, I list the credit card company and the phone number That way, you won't forget to call someone and get a rude awakening.

I make copies of the following and leave a copy at home with a relative. I also take a copy on the trip and secure it in the hotel safe:

passport
credit card info
medical insurance cards

Also, as the previour poster recommends, I only carry a copy of my passport with me after I have arrived at my destination.

If you have additional aoncern, you can register your trip at the US State department https://travelregistration.state.gov/ibrs/