Travel heavy: Take spare hearing aids, batteries, and chargers. Take your FM system and its chargers. Take your laptop so you can communicate by email if you need to talk to someone at home. Take converters for every country you will visit. Take a power strip to plug all those devices into the one outlet that may be in your room. Take your cell phone even though you won’t have cell phone service.
Take your laptop so you can email home if necessary. Take your cell phone so you can look up addresses in your Contacts.
Don't forget the power strip! The picture with this post was taken on another foreign trip. I practically needed a separate bag just for the chargers.
To read more about my travel adventures and mishaps, and maybe pick up a tip or two, read Planes, Trains and Automobiles on What I Hear.