Organized work space, Efficient work space

I have noticed recently, that I have a progressively smaller amount of work space at my desk.  Stacks of paperwork and reference material continue to encroach into the open area.

I figured it was worth it to take a few minutes, and dispose of the hard copy that I no longer need, as well as re-organize those that I do.  Things get kept that at the time were important, but 6-8 months later, can get filed or discarded.