I spend a lot of time at the Scotts Valley Skateboard Park. Go to other parks as well. We are building a half-pipe at my buddy's place. Its great exercise.
Do a lot of MTN Biking at UC Santa Cruz and Soquel Demo Forest. Night rides are a blast. Go to North Star a few times a year for lift assisted riding.
Bodyboard when ever there is swell.
Gym rat as well.