A while back... Last year I think, I saw a lego storage idea that immediately captured my interest. I didn't organize quite the same way that gal did, but my idea was based off hers. Sorry, can't remember who the gal was .. it was a while ago you know. :)
Stuff to be taken apart, instruction manual, knex, and those warrior bugs things
Second section has our bigger building blocks
Third section has plates/flats/castle sections, and miscellaneous big stuff.
Fourth section has figurines and their stuff, angle pieces, automotive pieces and speciality building pieces.
Like me.. the lad would happily subdivide all these categories even more if we had the space...but we don't have room to divide all the blues, blacks etc up. We have to jumble them as much as it bothers us. :) We can't separate it all.
In use pieces sit on top. Spiders, castles, vehicles and more. :) If it don't fit, too bad, so sad lad, can't keep it all up.