Order tickets online and have them waiting at the station for you in Paris so that you don't have to worry about losing them during your trip.
Reserve your seat; they are mandatory from Paris to Milan. While some trains charge extra, these tickets include the price of the reservation.
Pick a seat in either first or second class, depending on how much you'd like to spend the amenities you wish to have while you travel.
Choose a day or night train from Paris to Milan. The ride will take you anywhere from 5 to 6 and a half hours each way.
Cruise along at speeds up to 180 mph on the Artesia trains. Both the day and night trains are some of the fastest in this area of Western Europe.
Enjoy drinks in the Artesia's bar car and snacks from the train trolley cart. You can also bring your own food and non-alcoholic drinks with you aboard.
Know that some of the Artesia trains between Lyon and Milan have a dining car with full meal service.
Understand that your ticket will be checked once you are already on board the Artesia train. You will need to show your passport at this time as well, so don't put it in your checked baggage.