|Mental Clutter by Alberto Ordonez, on Flickr|
For the Over-Busy
In the classic Seven Habits of Highly Effective People Stephen Covey talks about the balance that needs to be struck between production and production capacity. You can only drive, drive, drive the car for so long before it won't move because it needs fuel or an oil change. If you're focused on production so heavily that you're not building in organization time it will catch up with you.
For Folks in Transition
It's likely that you have accumulated stuff from your prior life. If you've determined that you're going to establish a new career identity part of the transition is letting go of the unrelated accoutrements of your prior career.
For the Creative Minds - You might not be a person who can be productive with nothing but your current task on your desk. The guy down the hall just can't concentrate with a clean desk because he's constantly thinking about what essential task might be hiding in his desk drawer. If this is an issue for you, there are multitudes of desktop organization and storage systems out there now - take a look at whether any of them can work for you.