Recently we took down some shelving we had inbetween two IVAR (IKEA) units and replaced it with a band of patterned fabric we liked. This ended up being a great way to accent the room. My wife subsequently used the same fabric to cover two pillows on our couch (adjacent these units) which helps tie the whole thing together.
We hemmed the edges, and tacked the top and bottom to the horizontal rods (in our case 1x2 pine) with a staple gun.
The fabric cost $10.00 for 2 yards from IKEA, which was enough for the hanging and the pillows.
None of this helps us clean up our living room when we're sleepless from a brand new second baby, but it does keep things lookin nice!