Just watch the intro to an old movie or sitcom that you can remember from back in the day.
If it's on, it's because there is something I feel is worth my time and attention.
(One reason I broke up with an otherwise-potentially-serious partner some years ago was that she -- and her family, it was a familial trait -- seemed unable to be in a room for more than a minute without turning on a TV.)
That being said, I only first watched the show in the last few years, early 30s. Would almost certainly driven me crazy earlier in life.
It is happening again.