I think being organized 'once and for all' would only work if one never ever bought any new items to join the party.
So - when organizing/stashing/filing - I think it's good to leave a little wiggle room for possible new additions.
Another way of stowing things might be by 'frequency of use' - the items one uses often would be kept really handy - and the ones that one vaguely remembers having and were last used ten years ago - could be stashed in clear boxes 'up high' on the shelves.
I don't have a particularly 'good' system, either - and I'm gradually learning that 'more' is not always 'better'