San Francisco: Any advice?

In ten days, Alex, Toby and I will be taking a long-awaited trip to...San Francisco! We're staying in Noe Valley and can't wait to walk across the Golden Gate Bridge, hang out with my sister, and ride these insane-looking cement slides. Alex also wants to walk around Berkeley and reminisce about his college days. We don't know the city that well, though, so I'd love to ask: Do you have any recommendations of fun things to do? Restaurants? Shops? Day trips or hikes? We would LOVE to hear! Thank you so much for any tips. San Francisco is so amazing! xoxo

P.S. These sails look incredible.