This doesn't mean that every side of your apartment has to look like a mirror image, but if you do decide to align art pieces in a straight path, pull out that tape measure, and make sure everything sits perfectly. Any small disruptions in symmetry will look like major mistakes on the wall.

If you opt for an asymmetrical arrangement, make sure you do it with purpose. The same care you use to hang artwork symmetrically should be applied to placing pieces that are staggered.