I used to just keep piles of paper on my desk. Our business generates and keeps lots of paper. I knew it was all important but the thought of sorting through all of it seemed overwhelming, so I didn't.
I still have piles. But now at the end of every week I put those piles in a box or envelope and send it off to Papertrailer.
They do all the sorting, and even label everything in a way that automatically “files” it. If I disagree with their labeling, though, I edit it.
All that’s left for me is to add my own labels and BAM, everything is organized, categorized and I can find every single document.