Do you take all your vacation days? Are you under the impression that taking less days off than you’re allotted will show your boss what a great employee you are? Think again: New research shows that people who take all of their vacation days get better performance reviews. We all know this intuitively, that we are not performing at our best when exhausted. Taking a break can bring you back and increase your performance. It’s also a good time to show your boss you can delegate. You can feature members of your team and let your boss know you are a good leader with valuable employees backing you, and the company, as a whole.