Simple answer; whenever you eat, always overflow your food need bar. More complicated answer, try to keep you Food need bar at full or near full at all time & always overflow it when eating. The Quickieburger job is your friend in this. I was basically taking a break every two hours to nom down a quickieburger with cheese while just motoring the job. This assumes you've already resolved the [redacted] there first so you're earning $15, but I think even at $7 hourly it is worth your while.