As a successful sales consultant, Dave Won gets a lot of satisfaction from his hard-earned green. I am referring, of course, to the verdant lawn that he cares for like one of his children. “I’m competitive,” he says. “My neighbors have good lawns, but I’m going to try to get a better lawn than them.” For a lot of office workers—OK, mostly middle-aged male office workers—a manicured lawn is as much a status symbol as a luxury car in the driveway. Excelling at work and yardwork fits the modern professional’s fixation on optimizing everything. The office biohacker who won’t shut…