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.
Character master list. Got a lot of characters? This "quick and dirty" list helps you remember who's who at a glance. Add names, ages, and comments. Drop in a photo or drawing of each character to help you visualize your story.