If you are prone to overworking, I would suggest hacking your work ethic: Whenever you are doing something, consider it an assignment. If you are eating a meal, don't let anything distract you. Eat in peace and when you are done, move on. If you are spending time with someone, don't drift to a work related topic. Be completely present with them and only them. That way, your work won't be an addiction, it will simply be another thing to stay present in.