Never wear the same thing twice

Apparantly not only in real life you have to wear your clothing pieces more than once, but on the Gossip Girl set some items should be re-used as well. I was wondering what they did with those thousend dollar dresses after using them for a couple of hours.

In the left two pictures you see Serena wearing the same necklace in different episodes. In the right two pictures you see Blair wearing the same skirt twice. I was not sure it's really the same item (that's for the skirt as well as the necklace) but they're suspiciously similar.

In real life most of us cannot afford throwing close away and never wear it again. Or give it to a good cause, a youger sister, the girl next door or your best friend. We have to wear or clothes multiple times.
The lesson I extract from this, is not putting your clothes away after wearing them, but try to wear it in different ways. Don't always put on the same skirt with the same top with the same vest. It's boring. Experiment a little and put together something unexpected. This way your pieces are like new every time you wear them. That's a lot cheaper than wearing them once and a lot more exciting, I think.