Rderox, I'm still struggling with putting my organizer 'together' too - I've added things slowly.. Just added 'Someday/Maybe' and 'Later' (both for projects) today.. Already have the Next Actions (several more contexts though, at the time).
Yes, those articles are helpful, and there's also some stuff on YouTube - eg someone building their own organizer..
Basically, it probably depends on you - what would you feel better with - several notebooks or just one?
What do you need in certain contexts, is a small notebook easier to carry than a big organizer? You can also experiment to see what works best..
(I'm sure still experimenting myself! )