Find out how you are traveling: Train travel in Europe is divided into two classes. First class costs more but usually has more legroom, meaning passengers are typically granted more room to stretch out and more room to store their items. Second-class seating is usually padded and allows passengers to lean back and enjoy the ride, but second class offers less storage space for many items. Check with the travel agency, touring group or ticket seller to find out in which class you'll be traveling.
Get a map of the stations you will using: European train stations vary greatly. Some stations have modern, up-to-date amenities that allow travelers to easily transport baggage via escalator and elevator. Other stations may only have staircases or ramps. If possible find out the layout of your stations in advance. Pack more lightly if you are using stations where transporting goods may involve carrying them up stairs.
Aim for no more than one or two bags per person: Many European trains offer very little storage space. Limit yourself to one carry-on bag and one larger bag for each member of your group. Even if you are traveling by tour group, where all baggage is taken with you, fewer bags will be easier to monitor so that no important items get lost or stolen.
Pack seasonally: Many European countries have a four-season climate. Plan for travel by packing appropriately. Bring a bathing suit when traveling during the summer. Bring winter clothing when traveling during December and January. Bring at least one formal outfit in case you decide to visit a fine restaurant or other upscale attraction. Look for fabrics that don't wrinkle if possible. Even in first class your baggage may easily get packed tightly together with other luggage.
Always have essential items with you at all times: Keep your passport, money, prescription medications and other important documents such as a list of hotels in a pocketbook or other bag at your side during the entire trip. Do not store these in your luggage. When traveling from one country to another by train, you may be asked for your passport by the conductor or other officials. Having it within close reach makes that process much easier.