I too have the small notebook and big notebook system (let's call it SNBN). The small notebook is a to-do list, the big notebook is for free-flowing ideas. Onl

I too have the small notebook and big notebook system (let's call it SNBN). The small notebook is a to-do list, the big notebook is for free-flowing ideas. Online I've tried a notebook in Google docs, a tasks spreadsheet, and workflowy, but nothing has jumped out as the clear winner.