When I finally decided I was actually going to write my book, the excitement was undeniable—but so was the overwhelm. How do I store and organize writing ideas? I wondered. I had my topic nailed down, but the thought of starting from scratch felt daunting. That’s when I remembered something that energized my whole process: Evernote.

One morning, I was lying in bed, feeling inspired with a story that needed to fit into the book somewhere. I opened my app to create a new note, and stumbled upon a t...