I don't know how to articulate it, but I could never do anything like this. The ability to organize one's life like this is so foreign to me, it's almost like he's describing what it's like to be an octopus. I think it may be my emotional state that I can't manage. There is absolutely no way, I could decide what I'd be doing the next day every night. The thing is my state of mind would prevent me from doing half the…
My partner relies on a Leuchtturm weekly planner; my father bought into the whole Stephen Covey system; a coworker has a stack of Post-its, and I use a hodgepodge of Google Calendar (far off single events), Apple Notes (weekly tasks for work) + Reminders (medium-term todos).
The whole point is not to rely on one's (aging) memory to keep track of stuff. As long as tasks aren't falling between the cracks, keep doing what you're doing.