If I decide that a piece is no longer necessary in my closet, I work to keep it in use + out of the waste stream. It might find its way to etsy or ebay as I feel that this is a good way to get it into the hands of someone who will keep it in use. Sending items to the thrift store is a last resort, since I know that they may end up clogging up a foreign clothing economy (though I appreciate finding treasures there).
I really like refashioning things into new (or just a little bit different) things. Apparently I have a limited attention span, so it's great if one thing can become a different thing. A long sleeved top can be made into a shorter sleeved top...a dress can be turned into a less substantial dress, top or pajamas. Sewing a jacket from a well-loved dress + its scraps might be a little more time consuming, but also rewarding. Pants can be shortened or tapered. A jumpsuit can be made into pants. My made link holds a lot of simple refashions.
Bottom line: get it worn! :)