Box Up Anything You Haven't Worn In A Year
We all have those pieces we think we like, but we ignore time and time again because we don't actually like them. Sure, that dress is cute in theory, and that cardigan looked amazing on the mannequin, but for whatever reason it just doesn't make you feel amazing when you wear it, which is why you always skip over it and go for a piece of clothing that does make you feel nice. 

Even though we know this deep inside, sometimes it's still hard to part ways with those pieces. So take them out of your wardrobe, put them in a box you can put under your bed, and see if you miss them. If you do, you can always take them out of the box and put them back in the closet...but if you don't after a few months, you will know it's time to donate.