Basic French language learning. My wife and I like to travel more like locals when going places. So knowing some of the language helps. The French were (universally) kind and spoke enough English. But, ~10 hours of prep would have helped us navigate restaurants, taxis, etc. Hire real, local tour guides if you can. We used “Tours By Locals”, which is like AirBNB for tours. Out of the three we did, the two best were (a) food tours with (b) guides very familiar with the USA. They gave interesting perspectives because of (b). A little effort goes a long way. We would try to speak French as much as possible. Acted kindly and graciously. Universally, the French responded in kind. (Kind of surprising given reputations.). Try to blend in. I think this is a courtesy as a tourist. My wife spent some time looking at blogs on street fashion. We brought the right stuff to dress as the Parisians do. They knew where we were from, but we felts treated a bit differently. And it wasn’t much effort. Ask a chef/foodies for recommendations. Halfway through the tour, I DMed @themontereySA, a friend+chef from San Antonio. He spends tons of time in France. His 5 recommendations not in any guidebook -- all home runs. If you know someone with experience, hit them up. Trust Google Reviews. We learned to escape from the tourist areas for any food or drinks. Places with great Google Reviews further afield were 100% great. Seems every English speaker rates stuff!