This. The longer I 'work from home' the more I discover the importance of separate physical spaces for certain activities. If I spend enough time on entertainment in the same space that I work all day, over time working in that space seems to become more and more 'energetically mixed' (for lack of a better term) and it seems to get harder to focus on specific non-entertainment tasks. I now refuse to eat, sleep, or indulge in entertainment in the same space that I work. I don't even let myself read fiction books where I work. I try to do all deep thinking while walking outside, read fiction in bed before sleeping, and only work while standing at my desk.