We have a tv per desk (we have wide u shaped desks in an open-office) above our desks in my office with chromecasts in them. Presumably these tvs are for showing things off, or displaying things should we ever have a meeting in our production area, but for the past 3 months I've been here, I've just seen beautiful sunsets, waterfalls, cats and many other relaxing images.

Just walking into the office, or taking a break from a frustrating problem and seeing these 30second (or however long) stills has done infinitely more than any motivational poster could or would ever do for me.