Much thanks to the great John August, a practicing screenwriter who isn't afraid to share the nuts and bolts of storytelling. He put up a post about "Dogfooding" and its "close cousin," which he refers to as "scratching your own itch." In his words:
If you’re writing a movie you yourself wouldn’t buy a ticket to see, you’re wasting everyone’s time.
It's tempting, when writing books, just to throw stuff in there to meet a contractual word count, or to vomit into the word processor in order to produce some letters that will go in between covers. But we must always fight the temptation and instead work to produce something we ourselves would value.
August's advice goes for any story you're telling, whether it be in fiction, nonfiction, or face-to-face. Heck, even the story you're telling with your life. Make it worthwhile, or you're wasting everyone's time.
FYI: The full post can be found here.