Im jelous. I love san francisco. When I went we went to some wax musiem and that was pretty cool. We also saw alcatraz and that was pretty cool too. If you have a rabroad with you and you arent afraid of the cold you might want to try baker beach or if you want to travel a little ways you could go to santa cruz. Thats all I have to say for now. Oh ya and while youre there you should go down lorabard street just for the heck of it.
check out the SF museum of modern art, various art galleries, lots of music and poetry shows. If you're in downtown you can pretty much just walk around with a camera and shoot or film all the odd happenings
go up to tahoe if you like to ski/board...it's 2 or 3 hours from the bay area. you could stop in sacramento on the way to tahoe but it kinda sucks in the winter