I have a small bin that holds hanging files. I keep it on the dining room table which is incidentally where my laptop usually is. I have files for new recipes, new bills, receipts and bills that have been processed but need to be filed, coupons, and cards and invitations. When I get the mail in, I sort through it immediately and file it into these folders. Every few days I go through my purse and ask my husband to extract receipts from his wallet. Then once a week I sit down and enter receipts into Quicken and pay bills and immediately recycle all the paper that we don't need to keep.
I can even see keeping files (or separate bins) for each kid as well to store homework projects, flyers, and art pieces they don't like enough to display but don't yet want to toss. Getting kids into the filing habit early can save time and brain cells later. This will be easier for some kids to adopt than others, but even seeing that paper can be organized this way can help kids learn to organize themselves later on.