Get your tickets and join the fans at a game at Rheinpark Stadium. If there's nothing happening while you're in the area, you might like to check if they give a tour of the facilities.
Need to know where Rheinpark Stadium is situated? It's in Vaduz, and entry fees apply. If you've got time to spare, take a look at Vaduz Castle, Malbun Ski Resort and Liechtenstein National Museum as well. They're not far from the sporting facility.