There's one novel, Cujo, that I barely remember writing at all.
Stories are relics, part of an undiscovered pre-existing world.
The monster nevers dies.
A person could see a lot without ever leaving his own living room. Especially if he had the right tools.
As with all other aspects of fiction, the key to writing good dialogue is honesty.
I think it's relatively easy for people to accept something like telepathy or precognition or teleplasm because their willingness to believe doesn't cost them anything. It doesn't keep them awake nights. But the idea that the evil that men do lives after them is unsettling.