According to a recent medical study, simply being exposed to pictures of plants and nature is enough to improve your mood. The study concluded that having windows that open to green space is more likely to improve your feelings of well-being over a scene which simply looks onto a brick wall.
Not every office space can have windows and moving to an office with a nice view, while preferable to many employees, is likely not practical. You can still take advantage of the conclusions of the study, however, by adding more plants and foliage to the office or even simply by having pictures and murals of nature hung around the office.
