Here's the result of my efforts:
http://www.jcaliff.net/cels/IMAG0276.jpg
The scary part is that I have five FULL Itoya portfolios of Ryu Knight. Three each of LoGH and Nintama cels (plus one small binder each of genga). Also two full books of Dragon Ball. I need one more portfolio for The Adventures of Teddy Ruxpin. I have one full one that you can see, and then the rest of the regular size Teddy Ruxpin cels are in the smaller of the two oversize binders behind the boxes. I have one Nintama cel that is so long it doesn't even fit properly in the biggest Itoya I have. I just let it curl over the edge since there's no paint on that part of the plastic. It was sold to me rolled up like a scroll.
Even the unlabeled portfolios are organized. The unlabeled one between boxes is all singletons, unknown series, and backgrounds. The unlabeled rightmost four are shounen miscellany, and the two just left of them (clear and yellow) are miscellaneous shoujo and kids shows. The one with the label you can't see easily between Hunter x Hunter and Romeo's Blue Skies is CLAMP stuff. If you look at the bottom shelf of the bookshelf to the left, you can see some of the many (now empty) smaller plastic files I consolidated from.
I think I'm getting too old to marathon organization like this. My back is killing me. I need to go lie down now.
I just put my old icon in my sig.
. I got about halfway through our collection and quit because I ran out of Itoyas. I've been meaning to order more, but I just haven't gotten that far. 
