Writing - Show, don't tell
My editor told me to think like a movie. In other words, to cut anything that wouldn't make it into the final cut of a film.
Sure, I thought that was crass. Simplistic. Easy for the reader, etc. But really, what is important here, is actually making a connection with a reader. If they've dropped the call, communication has been lost.
Also, there's the movie adage: don't tell em what happened, SHOW them. Action speaks louder (and a lot faster) than words.