For me, character is everything in a story, and I generally find that when I’m stuck with my plot, it’s because I don’t know my characters well enough yet. Plot comes from character. People want/hate/fear something and that leads them to do something, and that’s all plot is.
So when my young writers are stuck on plot, I always tell them to try going back to their characters and finding out more about them. Character interviews are really helpful when you’re first getting to know a new character, and there’s one here you can use, but when you get deeper into the plot it’s helpful to start really interogating a character’s motives.
I find these 6 Questions To Ask Your Charactersreally useful for that. And you should use them for all the most important characters in your story, not just the main character.