How do you do it? What do you ground it to?

I've got a Chassis Ground port, but no idea where to send it to. For some reason I think the coaxial cable that my cable comes in through builds up static that really interfers with the sound. I'm talking huge interference, occasional scratching in the sound and sometimes channels just fall away all together.

It doesn't do any of that when not watching TV: (IE: DVD, PS2, iPod, etc)