Watching TV. I haven't had cable or anything like that for years and it's strange to see "real" TV in other people's houses. I just use the ol' flat screen to play video games... couldn't live without that "vice", though. :p
I don't watch a ton of TV, but I still think you're stronger than I am: If there's nothing on cable among the nearly thousand or so channels I think I must have, I will turn the TV off or see what's On Demand.