The sensible way to watch TV

During the first week of school, one of my high school science teachers wanted to establish some guidelines for living, not all of which were science-related.  One of the best lessons he taught us was, "Don't watch TV.  Watch shows on TV."  He's right that it's too easy to squander time flipping channels aimlessly.  It's better to watch specific programs you know you'll like.  Three decades later, I still watch TV with this admonition in mind.