You can earn poster money from him by helping out organizing and selling posters while he is in town. Memorial Union has just the thing for you. There is a Student Travel Center located on the fourth floor near the Craftshop, offering help with planning any trip from Spring Break to a summer internship abroad. You can purchase plane tickets, Hostel memberships, International Student IDs, and Eurorail Passes from them. They also have an extensive library of travel books which you should feel free to browse through.
Any advice is also, of course, free.
The Union is also a great place to study or people watch while you procrastinate. The Rathskeller is a popular hang out for the college crowd. Put some money in the jukebox, buy some food in the cafeteria, and, if you are old enough, wash it down with some quality beer from the bar. On a clear and sunny day, When Kurt Vonnegut came to town, the line outside the box office started forming as early as 9 in the morning and looped all around the halls of the Union. If you are looking for something quieter, you can try some of the rooms on the upper floors.