Go to the beach, visit the historic Hotel Del Coronado and have dinner, then go to Mexico. If you have time drive a few hours North into the mountains. Lake Arrowhead, Big Bear.
If it gets boring..Buy the newspaper and look at the real estate ads. The prices of houses out there always crack me up.
Beyond the above you need to get advice from someone that knows what there're talking about because my few trips out there only make me dangerous.