7. Dont forget the shoeshine sponge
Not only will it make your dusty brogues look presentable, the judicious application of the sponge will cover minor scratches on your rental car. (If it looks too dull, add a smear of clear lip gloss.) By the way, when reserving a car in Europe, ask for a diesel model. Not only does European diesel burn cleanly, it costs less than gasoline and diesel vehicles get much better mileage. When fuel is $7 per gallon and up, every little bit helps.