Louise's paper organizing secret:
View binders (3-ring binders with a clear vinyl overlay on the covers) are an organizing favorite. I use them for organizing everything from my Christmas information, notes and ideas, to the appliance manuals and receipts, to articles that I have pulled out of magazines (to get rid of the paper clutter in the house.) Also, each kid has a notebook, where I keep school reports, medical and immunization info and other relevant paperwork.
Here's the fun part: I use wrapping paper to decorate the outside of each notebook- so my Christmas notebook has holly paper, my gardening notebook has a floral paper, and I let my boys choose papers for their notebooks (cars and dinosaurs), and the manual notebook has a striped paper. That way, I can grab the one I need easily and they look great on the shelf as well.
Whatever papers you need to reference often, or things you only need once a year and have to hunt for, are both great candidates for this sort of order– I have an idea/wish notebook, a craft notebook, and a household upkeep notebook, where I keep things like paint color information and the dates and receipts from when we have work done. Make it work for you!