As the saying goes, it's better to work smarter than it is to work harder. Believe it or not, those words also apply to climbing your way up the corporate ladder. You don't have to put in twelve-hour days for years on end to catch the right eyes and land a promotion.
Whether you think it's fair or not, your actual performance at work isn't what matters most when it comes to earning a promotion. Rather, what's important is how people perceive your performance at work. So instead of working your way up the food chain by burying yourself under mountains of extra tasks and responsibilities, your best bet is to accomplish impressive goals and then make sure the right people know about those accomplishments.
Not that you want to become the office braggart, of course. Remember: Perception counts. Even if you have a staggering record of success, a reputation as a horn-tooting narcissist will get you disqualified quickly.