Going to the Bay area (CA), what should I do?

I’ve been to the Bay area many, many times, but I usually go to the same places, eat the same food, see the same sights. What else is out there? Any fun little odd shops, or restaurants, or attractions? My nights will be booked, but my days will be free.

Just in case you were wondering, I’m going up to Berkeley to see DMB at the Greek. 3 nights. I also have an extra set of tickets if anyone wants to meet me. :) Sorry I just had to tell you.