Turn off your mail and arrange to collect it at the post office when you get back.
Ditto with the newspaper if you get one.
Call your credit card bank and your check card banks and let them know when you will be out of the country and where you are going so that your cards don't get declined by the fraud alert personnel.
Make a copy of all important information--the phone numbers in Europe to report lost or stolen credit cards, your itinerary information, the addresses of those who want to send postcards to, etc. etc. and email them to yourself. You can retrieve them if need be from Europe.
Pay recurring bills in advance so you don't have to worry about trying to pay online from unsecured computers.
Do a trial packing ahead of time, tote the bag around a bit to see if it is too heavy. It will be. So take out things that you aren't positive you will need. Your back will thank you.
Then pour yourself a tasty beverage, sit back, and watch a Rick Steves video of your destination.
Good luck and enjoy your trip!!