Write like you write, like you can't help but write, and your voice will become yours and yours alone. It'll take time but it'll happen as long as you let it. Own your voice, for your voice is your own. Once you know where your voice lives, you no longer have to worry so much about being derivative.
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 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 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 WendigYou can feel good about failure. Failure means you did something. You finished the story even if it wasn't what you'd hoped. Failure means you're learning. Growing. Doing.
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 WendigNobody becomes a writer overnight. Well, I'm sure somebody did, but that person's head probably went all asplodey from paroxysms of joy, fear, paranoia, guilt and uncertainty. Celebrities can be born overnight. Writer's can't. Writers are made - forged, really, in a kiln of their own madness and insecurities - over the course of many, many moons. The writer you are when you begin is not the same writer you become.
Chuck Wendig