Keep it simple, stick to a simple job, and you’ll be able to go home at night and be alone with your thoughts. No one needs to hold an emergency meeting with a waitress or postal clerk after the office has closed. A janitor doesn’t need to brown-nose via Facebook while camping with his kids. That guy at the DMV who takes your (always unflattering) driver’s license photograph never worries about all those urgent emails flooding his work inbox. No, in those jobs you put in your eight hours of hard, shitty work and then you leave it.