I've started building custom pdf planners for these eInk devices (I'm an rM2 owner myself) and am always looking for insight on how people use them. Have a little website setup for this at https://hyperpaper.me
The TODO lists I mark with Done, Won't Do, or Rescheduled for the future. That process is valuable, if I push something off too many times, I evaluate if I really need to do it.
I started with the Panda Planner Pro, but I ended up finding the personal and reflective things more onerous than useful. So once I filled up the first one I moved to the Amazon Basics Daily Planner ( https://www.amazon.com/gp/product/B078GVYRZG/ref=ppx_yo_dt_b... ), which I mostly like. I like having two days of todos at once, because I can just see more that way. I'd probably be just as happy to have 3-4 todo columns per 2 pages, 5 would be convenient but probably too small.
I'm considering the Clever Fox Pro for the next one, but it's $40 while it has a nice week view, it probably doesn't have enough todo entries, I really need a good 10-15 per day. Maybe I just need a week todo, with daily "priorities". That would probably be ideal.
I'd like to try the "timeslots" where I plan out my todo a bit more with times, but that may or may not work.
A couple years ago I went from a largely "paperless" life to using a daily planner, largely for my daily work and personal TODO lists, and have found the process very valuable.
I toyed around with making a custom template for my daily notes/lists, and using the RocketBook ecosystem (maybe with just my own printed templates and using their app for scanning), but in the end just stuck with pre-printed planner books.
I'm just getting ready to order my third planner, and this topic comes up and tempts me with a technological solution to a largely solved problem, but makes me wonder what benefits it might have.