For me, it is much more efficient to leave my material in orderly piles waiting for the next round of activity. Actually, I come by this tenacious strategy quite honestly. Having been carefully trained by my peers in the importance of such activity, I feel duty-bound to perpetuate it. All it indicates to me is that a tidy person sits there, and tidiness does not necessarily indicate the abilities of a desk's occupant. Being a member of the relatively untidy community, I also have come to recognize different types of clutterers.
Outsiders only see people with messy desks.
I, however, see desk-clutterers with distinctly unique characteristics. These folks have no order to the chaos on their desks because they are blown into action by the crisis of the moment. Their productivity is usually less than stellar, and they frequently misfile important material in the process of attempting to undo the sandwich. These professional procrastinators are usually working beyond their means and are in over their heads. We SEFLs believe that every tidbit of information is valuable and will probably be needed in the future, so we save every fragment.