You may be able to get a little more done if you eat work at your desk while catching up on emails, but you’re not doing your body (or your mind) any favors. Instead, take a walk during your lunch break. If the weather is nice, eat outside and enjoy the fresh air. When you get back to the office, you may find that a little respite from the corporate environment has left you refreshed and ready to take on the rest of your day.