Eat like the locals. The traditional meal of the area is a lamb soup and bread dish known as Yang Rou Pao Muo. After dark, vendors in the area sell hot pot, noodles, dumplings and other items, usually by the light of small red lamps.
Buy souvenirs. Baihuo-Market is a great place to stock up on CDs and movies to enjoy on the long train ride. South Street is your shopping destination if you wish to buy upper-end items and clothing.
Research your travel options online before you go to book your tickets. Consider whether you will want a soft sleeper, hard sleeper, soft seat or hard seat, as all are options available to you.
Visit a ticket office, hotel or travel agency a few days in advance to book your ticket. Be aware that many of the ticket office staff do not speak English so you may want to book through an English-speaking agency, especially if you have questions.
Pack light and always store your documents in a secure pocket in your jacket, pants or shirt in order to stay safe. Be aware that you will be sharing a carriage with others and may have little room for belongings.
Arrive at the Xi'an train station and go to the ticket office in order to pick up your tickets. There many not be many English-speaking employees at the station. If you cannot speak Chinese, arrive early to overcome any language issues.
Keep yourself occupied. This trip can be a long one but you should be able to enjoy it if you mix up your activities. Keep in mind, though, there won't be the same entertainment rental opportunities as domestic train lines provide.
