If you carry on a pair of slippers to put on in the plane you can travel in your boots giving you more room in your case. Some people find earplugs useful, especially if using city hotels where church bells or traffic may be a nuisance. A small umbrella can be useful for rain and shine protection. Medicines you know are always more comforting, so it is worth bringing a small supply of your favourite cures!
To avoid inconvenience in the event of your luggage being misrouted, we recommend that you carry onto the plane your washing kit and medications, a change of clothes, walking boots and day pack.
Water in Europe is drinkable unless it says otherwise, but if you are sensitive may wish to drink bottled water.