It’s true that you can buy special software or install apps to help you determine the content and organization for your book. OR you can list story ideas on color-coded Post-Its on the back of the door. Ha!
The photo above shows how I did it for my forthcoming book, A Priest Walks Into a Waffle House: Stories From a Gritty, Grace-Filled Life.
Call me a Luddite if you wish, but this “system” has worked for me on every book. Do what works best for you, but remember: the process does not have to be convoluted. Look for ways to simplify so that you’ll have more energy and time to make your writing sing.