Concentrate on California. There is so much to see in the state from the beaches to the mountains to the deserts. Lots of amusement parks, attractions, National Parks, and places to see before you die. You can spend many years here and not see everything.
http://www.visitcalifornia.com/
San Diego is one of the nicest cities in the country. It's a major tourist destination and there are tons of things to do. With 70 miles of beautiful beaches, countless parks and gardens, major league sports, dozens of golf courses, world class museums, Tony Award winning theater, great cuisine, best weather in the country, high tech industry, major universities, and the best zoo in the world, it's my choice as THE place to live and play in the USA.
Some must see attractions are the world famous Zoo, Sea World, and Balboa Park. Known as the "Smithsonian of the West" Balboa Park is the largest urban cultural park in the country. You can get a park passport which allows you entry to a dozen museums as well as the zoo.
http://www.balboapark.org/info/passport.php
Other attractions in the park are the Air and Space Museum, Ruben H. Fleet Science Center and IMAX theater, the Natural History Museum, the Museum of Man, the Automotive Museum, the Old Globe Theatre, the Hall of Champions, the Botanical Gardens, and the largest outdoor pipe organ in the world (free concerts on Sunday).
La Jolla offers great views, great surfing, great food, great theater, and great shopping.
Check out the surfers at historic Windansea Beach. At low tide you can walk out onto the tide pools. Walk along the Cove and check out the caves. Visit the Museum of Contemporary Art. Take a stroll on Prospect St and check out the shops, galleries, and have some authentic Mexican food at Alfonso's. Then head to the Birch Aquarium at The Scripps Institution of Oceanography. It has a spectacular view of the bluffs over the Pacific Ocean. The Tony award winning La Jolla Playhouse is located nearby on the campus of UCSD. For a few laughs at night, The Comedy Store is on Pearl St.
http://aquarium.ucsd.edu/
Check out these sites for discount coupons and other info
http://www.sandiego.org/nav/Visitors
http://thebestplacesinsandiego.com/