A feature of the smaller spaces is that you may not have much space on the walls to work. What you have can be picked up by your most beautiful works of art or your favorite photos. So, if you find yourself in this position, try adding a mirror to the ceiling. The picture above shows how this can actually open up the space.
A built-in mirror seems to belong to the design. In cases where a built-in mirror is not possible, try a frameless flat mirror blending into the ceiling.