Check Eurail ticket availability. You are searching for a long trip preferably more than eight hours.
Purchase a ticket that will take you where you want to go and that will last as long as you wish to sleep.
Gather your things and board the train. Find a seat near a window or wall, preferably in a corner to be a little less conspicuous.
Pile all of your belongings on your lap or between you and the window. This makes them easier to secure.
Snuggle up against your belongings and sleep. Set an alarm to wake you when you should be nearing your destination. This will give you a chance to wake up fully before you reach your destination.
Use the restroom on the train to freshen up from your sleep before you arrive at your destination.
Buy another ticket for the next upcoming night of the same process. Enjoy your day wherever you ended up from your train ride. At the end of the day you can sleep on the train heading somewhere new. Following this process you can travel most of Europe on very little money.
