Alcatraz if you've never been, and can get a ticket.
Pier 39 is touristy
Wine tours in the valley is cool
Are the Giants playing in town? It's a beautiful ball stadium
There's a cool Harley shop you can visit if you like bikes
If you have a sweet tooth you can visit the Jelly Belly factory in Sacramento
...
Or, if you swing that way, go to Market St south(I think) of the giant rainbow flag, I'm sure you'll have a great time there.
