The beginnings of my Goodwill pile!
Originally I had planned to set a goal of donating a certain percentage of my current possessions, but that just seemed too arbitrary and difficult to verify. Instead, I am now going through my things and asking myself "Do I need this?" "Does this make me happy?" If the item doesn't evoke an affirmative response to either of these questions, it goes in the pile.
It's actually been a really great and cleansing process, and I look forward to how much easier it will be to find things I'm looking for and maintain some semblance of cleanliness once the de-cluttering is finished.
I will keep you all posted as my pile grows, and possibly post some items for sale on here if I get really motivated :)