Tons of information about things to do while you are in Asheville can be found at:
ExploreAsheville.com: The website of the Asheville Convention & Visitors Bureau.
RomanticAsheville.com: Not just for couples, this website has information on food, lodging, things to do, events, and more, also specialized guides and resources, e.g., Beer and Brewery Guide, Pet Friendly Guide, Scenic Drives, Spring Festivals, and much, much more.
Mountain Xpress: Weekly newspaper and website with timely information about what's happening in the arts, food, music and movies.
Other resources you might find useful:
