1. Use big secrets and little secrets to spice up your fiction
When you’re crafting a character, ask yourself: “what’s his secret? What does he most want to keep hidden?”
I never create character bios, where you fill in sheets and sheets of information about each character. That’s busywork. Once I know a character’s name, age, occupation, physical appearance, and at least one of his secrets, I’m good to go.
Tip: try the “secret” trick yourself. Create secrets for several characters in the novel or short story on which you’re currently working.