I have found the perfect production binder....It has a D ring, so it sits flat, but is in a zipper case, so nothing can fall out. The outside front has a place to put file folders, clipboard, etc (also zips) and on the inside of the binder are pockets for cd's and my ruler, and whatever else you want. There's even a handle on the outside spine so when it's all zipped up you can carry it like a briefcase. When the show is over, I transfere everything into a plain binder and shelf it, and re-use it for my next show. it's made by a company named case it.
I am a Staples junkie....I can't go in that store for anything without coming out with a bag full of stuff...