I loved the guided tour bus that we took for a day trip. It took you to a lot of fascinating sites including a stop at Seal Rock. It also showed you the huge San Andreas fault line, famous houses, Haight Ashbury, Coit tower and other sites.
Also, you can take a tour of the giant Sequoia trees from a bus leaving San Francisco. I also agree with seeing Chinatown, Fisherman's Wharf.
Taking the ferry to Sausalito and eating at the waterfront cafes is also fun. Do not miss the tour of the Ghirardelli Chocolate Factory. There are tons of shops surrounding the chocolate factory as well. Watching them stir the huge vats of chocolate can make your mouth water. They have a store connected to the factory that sells all their products including cookbooks. I did not leave empty handed.
