Bring on the Cable Cars!

Jason & I will be heading out to San Francisco for a mini vacation next week and we’ll be there six days.  Well, okay, Jason will be working a lot of the time, but I’ll be busy exploring.  We’ve both been there once.  I was there for a few days in  1994 mainly to visit friends and Jason was there for a few days of work a few years ago, but didn’t get to see much. 

So, I’m planning our trip and I’m wondering if any of you have a favorite place or activity that you think we should see.  Or maybe a bookstore I shouldn’t miss?  I’d love some recommendations!