Bone up on the language
We're going to be in countries where English is not the native language. We always challenge our travelers to learn enough to at least order food or ask for directions.
These resources might come in handy.
The language maps in this series are great to carry along during the trip. They're portable, inexpensive, and contain pretty much anything a traveler might need to communicate. They were great last time we were in France and Germany. Click on the maps to take you to Amazon where you can buy them.
I've also been using this app to re-acquaint myself with German. I used Duolingo two years ago, and it was fine, but I like Babbel so much better.
Try it out!