Thank you! Finished the book already since reading your comment. Very simple, and encourages (and shows examples of) personalized variants, experimentation with

Thank you! Finished the book already since reading your comment. Very simple, and encourages (and shows examples of) personalized variants, experimentation with the system etc. I like it. Gonna start today. I've been just deleting things from TO DO lists when done.. which isn't very satisfying!