All of these suggestions also hinge on how LONG you'll be here. If only for a few days, a whole day up to Santa Barbara MIGHT not be what you want to do. But it sounds like you covered the major touristy things the first time around so ya might be up for doing different LA/SoCal things.

If you decide to do Santa Barbara, drive up there on PCH as it'll give you a lovely view of the ocean until you get to Oxnard, then hop on the 101 and head up to SB. Stop in and have lunch at The Spot in Carpinteria (12 miles south of SB). I have spent a week at the beach there for 36 years and it's like a 2nd home to me. Then head up to SB. They have a cute zoo, the pier, State Street with all its high end shops and what not, plus theres the Santa Barbara Mission. By then it'll be dinnertime so have dinner on the pier at one of the many restaurants. There used to be a Longboards there but not sure if its there anymore. Total surfur bar/grill restaurant but fun, the tables are surfboards.

Universal Studios is ok. They opened a new ride Revenge of the Mummy which I am dying to ride (no pun intended). Other than that it's not the best theme park around. If you like Disney parks and stuff, do D-land. Just be warned a) big summer crowds and b) they are doing alot of construction to prep for the 50th celebration next year.

If Tonight Show tickets dont pan out see Jimmy Kimmel at the El Capitan theatre across from Hollywood and Highland. It's free and fun for a couple hours in the early evening.

If you like art and gardens, theres the Huntington Library, Art Gallery and Botanical Gardens in San Marino (near Pasadena). You could make a day of going there in the morning/afternoon, then heading to Old Town Pasadena and walking around the shops and restaurants. The Norton Simon is in Pasadena too.

There's always a Dodger game. Or the Queen Mary tour in Long Beach which has the Aquarium of the Pacific across from it. Or see something at the Hollywood Bowl. Or the Disney Concert Hall or the Greek Theatre. If you're into cathedrals you check out our neo-moderne Our Lady of the Angels Cathedral downtown.

Hope these suggestions gave ya some ideas.