California's On the Horizon...Where Should I Go?

I will be making a return visit to the Bay Area in January and am looking for some new places to go. I've been told that I should go to Mendocino, so I definitely plan to check it out as I have not been that far north yet. I am, as always, looking forward to my trip (especially since California will be nicer than Ohio in January). This time, I'm especially excited, because I plan to visit the deYoung's exhibit: Tutankhamun and the Golden Age of the Pharaohs. I'm also excited, because I scored a ticket with frequent flyer miles, making my trip more affordable. I plan to spend the next month or so before my trip researching new places to go and new things to see. If you have any suggestions, let me know. I also plan to visit my favorite Taco Bell in Pacifica since I haven't been there for a while.