Once you have the important areas in your life organized, it will be easier to maintain this sense of order. There is a great feeling of accomplishment, pride, and calm that accompanies an orderly way of being. When you know you can find a document or a special something quickly, you can have peace of mind.
For myself, when I have finished cleaning out a drawer or an area in my home, I love the way it looks so neat and clean. It pleases me, and motivates me to maintain my creation.