San Diego: Balboe Park (museums are free first Tuesday of each month, I believe); San Diego Zoo, old city, downtown San Diego, Corolado island, La Jolla beach (don't forget to sea the seals on the beach); Torrey Pill (hiking, nude beach, and one of the world best golf courses; San Diego Outlet; Wild Animal zoo
Dining in San Diego: Asian food (Convoy Street is unofficially called Asian town in San Diego, you can find any kind of Asian food there. My personal recommendation - Dumpling Inn/Taiwan style; Old Restaurant老正兴/Shanghai; Tofu House/Korean), any bar/restaurent downtown SD, or any bar/restaurant by La Jolla Beach.
Between San Diego and LA: Laguna beach, Orange county,
LA: Hollywood Walk of Fame; Sunset Boulevard; Rodeo Drive, China Town, Disneyland, Universal Studio; any bars/restaurants downtown or in China town (you can try the one Jackie Chan shot his movie)