Two Nights in Austin - what to do?

I will be spending two nights in Austin next week (Tues 11/23 and W. 11/24). Any suggestions on what to see and/or do? I will be in a hotel right at 6th street so that will be fun. Any recommendations for a particular club? I can do country but prefer rock/metal. I will also have a car so if there is anything outside of Austin that is a must see please let me know. I plan on getting my fill of TexMex while I'm in town. Where would you recommend? Anything else I should know about Austin? Hoping to make the most of my time while I am there. Thanks for your ideas!