You'll need a roadmap that begins with a premise and culminates in an outline. There are a lot of different ways to get there, so we've made templates to walk you through several of the most popular plotting methods. Choose the one that fits your personal style.
Snowflake method checklist. Maybe you'd rather work from the top down than from the ground up. Inspired by fractal geometry (really!), Randy Ingermanson's "snowflake method" grows an entire novel from a single sentence. Each step of the process methodically expands upon the one before, filling in detail until you have a complete draft.