It is best to face your monitor or any other work you are doing. Turning your head or torso to the side is totally uncomfortable and a bad idea. Sometimes this happens because there is not enough leg room under your desk. Rearrange your workstation in order to face your work. Clean under your desk to provide more leg room.Adjust your keyboard arm.Clean up your desktop and put the most used material closer.
Move your monitor so it is in line with your eyes. Place it at a distance that permits you to read it without leaning forward. Play with the distance until you are comfortable and you can rest into the back of your chair.