Try changing your lighting. Fluorescent lighting and other forms or bright lighting can cause eyestrain, which may lend to stress. For the best lighting try working by a window or where there is natural light. Certain colors of your room can be more stressful than others. Colors such as red, orange, and other bright colors can also be more stressful on your eyes than creams and warm colors.
Background noises are also a major factor of stress.
Noises can cause irritability and tension headaches, which will eventually lead to stress. Making sure that you have a quiet place to think and accomplish your work is essential. First off a great stress releasing activity is relaxation. According to the stress website called Stress Assess, bringing relaxation exercises into your life is very helpful to your body. Tensing your body for a few seconds and then letting go relieves much stress from the body.