Everyone needs a file system. However files that need to be used frequently can live on your desk in something like this. I like that it's flat rather than graduated and has side enclosures. Keep those papers safely tucked in one spot!
Mercer Desktop File
For your neatest files... the Livy File Box from @ballarddesigns.
Turn a JoAnn fabrics crate into a vintage file box using a wood scraper and some weathered oak stain. | pennyloveprojects.com
Threshold filing box @ Target || Use these with book case and save $$ by skipping a new filing cabinet
10 Beautiful Ways to Store Your Papers | Apartment Therapy
some type of hanging file box like this would be great for your 'active' files on the kitchen counter by your 'in-basket' Room Essentials™ Desktop Storage Unit 12.2"x8.86"
Wood File Box- perfect for my tickler file system = DONE ✔ (found mine at Target)
Lucite file box from See Jane Work
DIY file basket - such a great idea for organizing paper clutter!