And don't forget to make sure that you have everything necessary for driving in Europe. Different countries have different requirements so you'll need to do your research but I'm thinking of stuff like headlight deflectors, spare bulbs, high viz gilets, triangles, breathalysers as well as car documentation (and the list goes go on!). There are also rules about using speed camera warnings in some countries and heavy penalties if you get caught. Driving on the other side of the road is also the one time when I don't mind the Mrs keeping an eye on what I'm doing (and vice versa).