Plot is no more than footprints left in the snow after your characters have run by on their way to incredible destinations.

Remember: Plot is no more than footprints left in the snow after your characters have run by on their way to incredible destinations. Plot is observed after the fact rather than before. It cannot precede action. It is the chart that remains when an action
is through. That is all Plot ever should be. It is human desire let
run, running, and reaching a goal. It cannot be mechanical. It can
only be dynamic. So, stand aside, forget targets, let the characters, your fingers, body, blood, and heart do.

But, how do you know if an ending is truly good for the characters unless you've traveled with them through every page?

Plot, plot and more plot. Many layers to the storytelling and a huge cast of characters that are very well developed,

The principle I always go on in writing a novel is to think of the characters in terms of actors in a play. I say to myself, if a big name were playing this part, and if he found that after a strong first act he had practically nothing to do in the second act, he would walk out. Now, then, can I twist the story so as to give him plenty to do all the way through? I believe the only way a writer can keep himself up to the mark is by examining each story quite coldly before he starts writing it and asking himself it is all right as a story. I mean, once you go saying to yourself, "This is a pretty weak plot as it stands, but if I'm such a hell of a writer that my magic touch will make it okay," you're sunk. If they aren't in interesting situations, characters can't be major characters, not even if you have the rest of the troop talk their heads off about them."

(Interview, The Paris Review, Issue 64, Winter 1975)

It's lack that gives us inspiration. It's not fullness.