I carry my camera with me in the car. I'm usually alone, thus I'm driving. Especially along 280 between San Jose and Hillsborough, there are some really beautiful trees and the green this time of year accentuates their graceful presence.
Here's a shot I took yesterday. Opened the passenger window, stayed in the right-most lane and held up my Canon 40D and pressed the shutter. Hoped for the best.
This photo - unretouched. I didn't even have to straighten it up.