Hi Gretchen:
Call your credit card company and ATM card people and let them know you will be using the card in Europe. That way they won't block the charges. Verify that you ATM card will work and that it has a correct pin.
Make sure you get a non-800 number for your credit cards and ATM card if you have to cancel them if they are lost.Keep it in your money belt. Take a photo copy of the card as well.
Leave copies of all information with a family member. Copies of passport, credit cards, numbers to cancel cards, copies of medical cards, copies of hotel list, airline information etc. Also designate someone in the states to authorize care if you are in an accident. I work in the health
hinsurance field and some advice I would give is to leave written authorization with someone stateside to autorize health care and have access to health care information other than a spouse.
Lastly, remember to relax and have a great time. You will.
I have taken this tour and had blast