Do you have piles of paper on and around your desk?  What do your co-workers think?  More importantly, what does your boss think?  Studies have shown that if you have two employees up for promotion who are of comparable ability, the more organized employee is much more likely to get promoted.

Do you customers ever see your desk?  First impressions are very powerful.  I know personally, I immediately lose confidence in a vendor if the first thing that I see is chaos and piles.  Check out this recent article in the Detroit Free Press on this topic.