As it turns out, the commute to sabbatical is about as punishing as the commute to work. Wake up at 6.30am, half an hour later than usual. Snooze and listen to the radio for half an hour, 10 minutes longer than usual. Get up, and by 7.10am you're on your bike heading north. Cross the Golden Gate Bridge heading out of the city at 7.40am, and at 8.40am you're in Tiburon boarding the 8.45am commuter ferry to the San Francisco Ferry Building. By about 9.30am you've arrived back home ready to start the day.
The below is a photo from the ferry, not of the ferry.