1 Avoid Paris
2 If you are using satnav make sure that it knows that you are driving on the right. A couple of biker mates of mine got off the ferry, got to a mini roundabout, one went left and one went right. One took the first exit, the other took the third.
3 If in doubt wave you arms about while shouting "Zut alors", which doesn't really translate into English, but the nearest is wtf.