I find paper to be the best way to keep track of checklists and information that I'm actively working on, or long term continuous work. Digital is best for information I'll need to search through quickly or access large amounts of at any time.

Sketching out ideas for something I'll build over the weekend: paper. A list of things I need to get done and chip away at over the next 2 months: paper. A complicated web of info that I might need just a part of at some indeterminate point in the future: digital.