Hello, I'm the author of this article, and just wanted to add something here: for anyone who finds the Bullet Journal method overwhelming, there's another system called Strikethru that might appeal more. It's still based on pen and paper, but is designed to be a bit less complex and doesn't use an index at all.

Here's the official Strikethru site: http://striketh.ru/#welcome

And here are a couple of blog posts I've written about my own process that might be useful. I generally use a mixture of ideas from Bullet Journal and Strikethru.

http://blog.bellebethcooper.com/strikethru-notebook.html

https://exist.io/blog/strikethru/

And finally, I wrote another article recently that looked at both these systems, as well as some other less-developed analogue methods that you might find useful: https://foundrmag.com/analog-methods-for-getting-things-done...