Then, there's the effects from writing. Much easier to notice because you have the little imp pointing out that this is a said-bookism, and that is a completely superfluous use of the progressive voice.
And sometimes, rarely, someone points out the hole in the logic to you. I used to admire Ursula K. LeGuin's "The Ones Who Walk Away From Omelas." Then someone pointed out that the poor child will not suffer one whit less because someone walked away, so it does no good at all to just walk away.