Who better to learn from than a Pixar storyboard artist? This list comes from Emma Coats. Some highlights:
#1: You admire a character for trying more than for their successes.
#4: Once upon a time there was ___. Every day, ___. One day ___. Because of that, ___. Because of that, ___. Until finally ___.
#5: Simplify. Focus. Combine characters. Hop over detours. You'll feel like you're losing valuable stuff but it sets you free.
#6: What is your character good at, comfortable with? Throw the polar opposite at them. Challenge them. How do they deal?
#7: Come up with your ending before you figure out your middle. Seriously. Endings are hard, get yours working up front.
#9: When you're stuck, make a list of what WOULDN'T happen next. Lots of times the material to get you unstuck will show up.
#10: Pull apart the stories you like. What you like in them is a part of you; you've got to recognize it before you can use it.
#11: Putting it on paper lets you start fixing it. If it stays in your head, a perfect idea, you'll never share it with anyone.
#13: Give your characters opinions. Passive/malleable might seem likable to you as you write, but it's poison to the audience.
#14: Why must you tell THIS story? What's the belief burning within you that your story feeds off of? That's the heart of it.
#16: What are the stakes? Give us reason to root for the character. What happens if they don't succeed? Stack the odds against.
#17: No work is ever wasted. If it's not working, let go and move on - it'll come back around to be useful later.
#22: What's the essence of your story? Most economical telling of it? If you know that, you can build out from there.