When in doubt, the rule of threes is a rule that plays well with all of storytelling. When describing a thing? No more than three details. A character's arc? Three beats. A story? Three acts. An act? Three sequences. A plot point culminating in a mystery of a twist? At least three mentions throughout the tale. This is an old rule, and a good one. It's not universal - but it's a good place to start.
Chuck WendigLet someone else take a crack at [your story]. Sometimes, even after time has passed, we're just too close to the thing. You don't want to kill your darlings or, maybe it's the opposite: you just want to kill all of it with cleansing fire. Let someone else confirm or veto your feelings. They'll also bring new questions and complexities to the table, too.
Chuck WendigYou've got all these characters and yet, you're hovering over one character like a fly over a stinky diaper. Realize that you've got a kickass superpower: you can possess and take-over anybody inside the story. With the power of Point-of-View, you can drag us along for the ride. You can shove us into their eyes, their minds, you can force us to piggyback on their experiences past and present. Sometimes untangling a knotted-up tale means looking at it from different eyes: what better eyes than those of the other characters inside the story?
Chuck WendigCharacters exist in a flat line until we challenge them - sometimes they challenge themselves, sometimes they're challenged by other people, by nature, by robots, or by fungal infections in and around one's nether-country. Stories need conflict across the physical, emotional, intellectual and spiritual spectra. Accidents, betrayals, cataclysm, desperation, excess - these are the letters in the alphabet of conflict.
Chuck WendigRemember: a story is not a vignette. It has a beginning, middle and an end. It is not merely a snapshot in time.
Chuck WendigIn my mind, only one inviolable precept exists in terms of being a successful writer: you have to write. The unspoken sub-laws of that one precept are: to write, you must start writing and then finish writing. And then, most likely, start writing all over again because this writing "thing" is one long and endless ride on a really weird (but pretty awesome) carousel. Cue the calliope music.
Chuck WendigStorytelling is an act of cruelty. We are cruel to our characters because to be kind is to invite boredom, and boredom in storytelling is synonymous with big doomy death-shaped death. So: be cruel to your protagonist. Rob him of something. Something important. Something he needs. A weapon. An asset. A piece of knowledge. A loved one. A DELICIOUS PIE. Take it away! Force him to operate without it. Conflict reinvigorates stale stories. New conflict, or old conflict that has evolved and grown teeth.
Chuck Wendig