The Nebraska Bookstore is located on the edge of the UNL city campus and in downtown Lincoln. They have a great selection of newspapers and magazins. They sell all the textbooks (and buy them back at the end of each semester) UNL students need. They also have a great selection of "husker-gear" that very affordable. This is definitely a good place to go to buy what you need for husker games.
They also have a good selection of art supplies.