If you excel at your work, you might get rewarded with… more work. Such is the way of the world at many workplaces! Your employer wants you to give 110% at work, and even that is not enough. In fact, some people recommend only ever working to 80% of your capacity to get around this fact. The reward for mediocrity is usually just keeping your job and getting a fine performance review. But if you excel, and you have a hard time saying “no,” you may wind up with dozens of extra tasks on your plate.