sweet, tv is mounted to the wall

[macphanatic]

Use low voltage or networking boxes (they're the orange ones, not blue) to create the access holes. They are very shallow and don't have backs, this makes it very easy to fish wires between the boxes.

For those that are reluctant to cut into their wall and fish wires, you could make a wood chase using decorative molding. I've seen this done where it actually looked very nice.