If you are coming to Autzen Saturday. Before the game you might want to take in the Saturday Market downtown, good food carts, local artists, etc. Also, check out the athletic facilites, some may be open for tours Saturday. Getting to Autzen, check out the Park N Ride run by Lane Transit...absolutely one of the best ways to get to Autzen and avoid the traffic. From the campus area, perhaps a walk to the stadium via the foot bridge over the Willamette River.
Plenty of great Micro Brew, Oregon Pinot Noir, and excellent coffee in the area.