If you had to give just one piece of advice to someone planning a trip to Italy, what's the most essential thing you would tell them?

If you are considering renting a car to travel between the main cities (Rome, Florence, Naples, Venice, Milan, etc.) don't do it - take the train!

It is way more relaxing, faster and likely less expensive - gas, toll roads and parking are all very expensive in Italy.

Renting a car is  great for exploring out of the way places but in doing so it is recommended to rent for a day or two from a main city; for example, Florence or Siena in order to visit the amazing towns of Tuscany.

Full disclosure - I am the CEO of ItaliaRail but even if I wasn't this would be my advice!!

Relax and don't overplan. Italy happens on Italy terms, on Italy time. Be prepared to just go with the flow - that's half the magic of the place.