The skill I would like is the ability to get rid of things that no longer serve a purpose in my life. I don't live in clutter. But I have too many things, and that creates psychological clutter. I tend to put things away in a drawer or a cabinet rather than removing them completely from my life. The thinking is that they may prove useful at some point. And in some cases that is certainly true. But much more often, the collections of things in the drawers and the cabinets just grow and grow!