When that idea prompts another idea, draw a line out from the first word to the second word. No matter your genre, each scene should keep a story moving, throwing the protagonist off-balance. One sentence to give me the backdrop and story setup.
At this early stage, I would add and rearrange these subtopics until I thought my list was complete and clear. How comprehensive you want to be is up to you.
Two approaches to outlining As a writer, you need two kinds of outlines: what you want to do and and what you need to do.
Write a plot for each protagonist Most novels have just one central protagonist, and it often works best. Then pick the variables that you want your story outline to track over the course of your story.
Take each line of the spreadsheet and expand it to a multi-paragraph description of the scene. Generally, works of non-fiction require research and citation of sources although many novels require their own research!