I used to use trillium notes (which is really good) for GTD and idea mapping for a few months but stopped. I just use a big three ring binder with some five star hard to rip paper now with some plastic sticky tabs for categories and write down things that are important. The barrier to taking down and recalling info is both low and high enough in just the right way that I remember things I want to remember and can rec…
I like your idea - what ever happened to that e-ink note pad one could write on and it saves a digital copy?