Another source of stress is: Striving to be somewhere else. Whenever you take a shower, or eat, or lie in bed, and you feel that you ought to be somewhere else (working) that's stress. That not only applies to whereabouts, but also to situations like "I should be ready with X so I can take on Y". To reduce that, you have to establish a clear declaration of working and resting time - resting means really switching off, not allowing thoughts to pull you back into work mode.

EDIT: I think the word I would use for countering this type of stress is "dedication".