The basic premise of Marie Kondo's Netflix show,is to test all your things. If, while holding the item, it does not spark joy, thank you for its service and get rid of it.
This sounds a little woo-woo, but the point is to throw things that you no longer use or want. I have given similar advice.
In addition to the whole "sparkling joy" idea, the exhibition offers several good organizing tips. Here are some of my favorites and how I adapted them to my home.