If you want to know how well you are managing your paper inbox you can apply a simple method. Each time you take a piece of paper into your hand you make a small dot somewhere in the corner.
After one week you sort all paper on your desk and count the number od dots on each paper. Now imagine how many of these items you could have resolved during the time you spent putting them from one place to another on your desk.
Keeping your desk clean can easily save you 15 minutes per day you don’t spend searching and rearranging the staff on your table. Over a year this will gives you 8 full days!