I kind of stumbled on this one! My wife just had our first child recently and I needed to relocate my work space. Well, just moving to a different room with different "scenery" really helped relieve some of the work at home stress that I was feeling recently. I feel more motivated to work and actually feel more creative in my writing. You think that you just stare at your computer for hours, but everything around you also effects you. If you face a wall all day, try moving your furniture to face the center of the room or a window. Change your desk chair. If I'm really stressed, I have this cotton bag filled with rice that I put in the microwave for a few minutes. I hang it around my neck while I work and it relieves the stress and tension. Stand up regularly and do some calisthenics! Life is too short to be stressed out! Cheers!