I'll be running a half marathon in San Jose on Sunday, but if you have nothing to do that day, I recommend you splurge a little and explore downtown Los Angeles in style by taking part in Charles Phoenix's famous Disneyland Tour of Downtown Los Angeles.
I did it this spring and it was delightful. A good time will be had by all and it's a wonderful opportunity to learn about Los Angeles arcana, the stuff the Hollywood tours never tell you. Have lunch at Clifton's Cafeteria, watch a puppet show at Bob Baker's theater, and have some ice cream afterwards. If not this Sunday then the following Sunday.