Before getting to work on the computer, you need to properly arrange your workplace. Your desk should be large enough to accommodate a monitor. Remember to adjust it, so that the distance from it to your eyes is at least 60 cm, and the top of the screen is at eye height. Having a window behind you when sitting at a desk is not desirable, as this will cause reflections on your screen. Consider buying a desk with a keyboard tray, as the keyboard should be placed below the surface of the desk. Another good idea would be investing in a good-quality chair, ideally with an armrest and a possibility to adjust the height and the seat-back.