I unabashedly love spreadsheets. I view spreadsheets as intelligent pieces of paper: totally freeform, but capable of calculations, lookups, list organization, and even database formats. Spreadsheets are a powerful technology that can externalize mental processes, organization, and memory.
I use spreadsheets for tracking my goals, health, personal finance, RPG games, and all sorts of other things. When I’m writing a novel, I primarily rely on spreadsheets to keep track of characters, scenes, and timelines. Here are a few examples: