Honeymoon? Stay around the Bay Area and skip LA. SF is more romantic, and has fantastic dining.
Chez Panisse, the birthplace of California cuisine:
http://www.chezpanisse.com/intro.php
Point Reyes National Seashore:
http://www.nps.gov/pore/index.htm
Calistoga Spa:
http://www.calistogaspa.com/
Clos Pegase Winery
http://clospegase.com/about.php
Oysters at Tomales Bay:
http://www.oysterguide.com/new-disco...1-tomales-bay/
Rent bikes, cross Golden Gate Bridge, take ferry back from Sausolito:
http://bikethegoldengate.com/
Mission Burritos:
http://en.wikipedia.org/wiki/Mission_burrito
AT&T Park is great, but Giants tickets could be hard to come by.