Passes--such as a Flexipass--allow travel during a specified number of days throughout the month. Keep in mind that having a ticket does not guarantee a seat on the train. Some stations require you to activate your ticket in the station. Look for these kiosks.
If the train you board goes through a country that isn't listed on your ticket, you'll be expected to pay full price. Always carry extra euros in case of an emergency.
Be prepared to show your passport and rail pass to the conductor. Theft is common on European trains. Sleep on your luggage or secure it with a bicycle lock. Reserve a sleeper as far in advance as possible. Friday nights are the most popular for travel.
Most train stations offer storage facilities for your luggage while you tour the town. You will need change to operate the locks.
Purchase pass insurance--Rail Europe's Rail Protection Plan--in case you're rail pass is stolen. The pass will not be replaced, but you can get a refund with the appropriate documentation. First, contact the local police to report the theft. Next, file a report with the European Rail system. You will be required to submit the police report to file a claim.
