There is something for everyone in the San Diego area.  Here are links to some of my favorite activities:

ATTRACTIONS
San Diego Zoo:   http://www.sandiegozoo.org/
Birch Aquarium at Scripps:  http://www.aquarium.ucsd.edu/
Sea World:  http://4adventure.com/SWC/default.aspx
Lego Land:  http://www.legoland.com/California.htm
Balboa Park:  http://www.balboapark.org/
Del Mar Fairgrounds:  http://www.sdfair.com/
Old Town:  http://www.oldtownsandiego.org/
Japanese Friendship Gardens:  http://www.niwa.org/display/home.asp
Quail Botantical Gardens:  http://www.qbgardens.org/
Carlsbad Flower Fields:  http://www.theflowerfields.com/
Downtown Gaslamp Quarter:  http://www.gaslamp.org/


PERFORMING ARTS
Coronado Playhouse:  http://www.coronadoplayhouse.com/
San Diego Performing Arts League:  http://www.sandiegoperforms.com/
La Jolla Playhouse:  http://www.lajollaplayhouse.org/
San Diego Repertory Theatre:  http://www.sandiegorep.com/
San Diego Opera:  http://www.sdopera.com/


MUSEUMS
Museum of Contemporary Art:  http://www.mcasd.org/
Maritime Museum of San Diego:  http://www.sdmaritime.com/
San Diego Museum of Art:  http://www.sdmart.org/
San Diego Aerospace Museum:  http://www.aerospacemuseum.org
Mingei Museum:  http://www.mingei.org/

SPORT
Area Golf Courses:  http://www.golfsd.com/
Del Mar Races:  http://www.delmarracing.com/
San Diego Chargers:  http://www.chargers.com/
San Diego Padres:  http://sandiego.padres.mlb.com/index.jsp?c_id=sd
San Diego County Beaches:  http://www.signonsandiego.com/feature/42/
San Diego Bay:  http://www.thebigbay.com/

And best of all......  THE WEATHER
http://www.wunderground.com/US/CA/San_Diego.html