Move stagnant energy - Holding on to the old often reflects a current vibration of lack and limitation, which will likely manifest more experiences to match.  When you freely release items with the Law of Circulation in mind, it allows for more of the good that matches your new vibration to flow in. 

If you have a hard time letting go - Remember, when you release that unused item to a friend or charity, you can provide another with the opportunity to enjoy that item.  

Reorganize your space to match your current vibration - Your space takes on your energy.  So during your spring purge, if you have upgraded your vibration since last time, it's likely also time to upgrade your space to match it!