Follow this throw pillow equation
To accent your couch, place two 20-inch-square pillows in a matching bold pattern in the corners. Overlap them with two 16-inch pillows in a coordinating solid color. Add one lumbar pillow with a subtle pattern (like a pinstripe) for balanced design.
Hang artwork at the right height
Most people hang artwork too high. Place a piece so its bottom is only three to eight inches above furniture—lower for large pieces and slightly higher for small pieces. When there’s too much space between furniture and a painting, the eye rests on the void, blank wall between the two pieces.