This one is easy. Buy binders at an office supply or discount store. Mine are from Walmart, $2 each. Fill them with clear plastic page protectors. Put a label on the spine and identify your contents.
Go through the drawer you throw your appliance manuals in and flatten them back out. Slide them back to back in a plastic pocket. Do the same with your warranties. And your sewing patterns. And your project ideas. And your child's artwork. Important documents. Tax information. Clipped recipes. Vet records. Get the picture?
The only hard part is getting started. After that, this is a breeze to keep up with, and it's so nice to be able to find the cell phone warranty quickly when your son wades into the ocean with it in his bathing suit pocket. Not that that's ever happened. Right?