Here is an easy way to find out, and the perfect time to do so. Tomorrow is the last day of the year. Turn all the hangers backwards in your closet. (See photo) When you wear something, be sure when you put it back that you hang the hanger the other direction, as one normally would. Anything still hung backwards on 12/31/2017 is something you need to ditch. That means, pass along, donate or trash if it is no longer of use to anyone. This a an easy chore, and something you can do NOW! Happy new year! And happy organizing!