Balance is overrated. Most people of accomplishment work 50, 60, even 80 hours a week. And that imbalance need not be deleterious to their health. A person who works slow and steady on work he or she is good at will be far less stressed than someone who's annoyed by their children's or spouse's shenanigans or who get frustrated with every bad golf shot.
Also key to success: As long as it's ethical, ask for what you want. People who don't ask--for fear of rejection, failure, imposing, etc.--usually doom themselves to far less success than they otherwise could achieve.