WHY: My TV was mounted onto the wall using a bulky bracket. From the left and right sides of the TV, the brackets would show. I covered them up by making two smaller sized boxes to fit and block the bracket area. I just recently remodeled my room, so I thought it would be nice to do something a little more creative than a standard shelf. The hidden shelf looks like a stack of dvds, but is in fact a hidden door.
This secret door is also a fairly nice way to conceal electronics.
Cost: Roughly $25
Every part seen in this guide can easily be purchased at your local hardware store.
This project should probably be done before the assembly of the outer cabinet, it will make measurements easier. Otherwise be ready to be asphyxiated by bondo fumes.