I've been looking for something to cover my TV for a while, most people just throw a blanket over it and they are done. My situation is a little different, I need more weight in the blanket behind the TV. So I picked up two wool blankets at Harbor Freight (had a 20% off coupon) sprayed some adhesive on them to put both together and some heavier wood on top with lighter wood on bottom just to give the bottom a little rigidity. Used a staple gun to secure everything together.
So for around $24 bucks I took care of some nasty reflections from the TV and I do hear a difference.
http://www.harborfreight.com/60-inch-x-80-inch-wool-blanket-92625.html