I try to follow the "one thing in - one thing out" rule although there has been more out than in for some time. I was actually just trying to think and I believe that I currently have about the same amount or perhaps less stuff than when we moved into this place from a one bedroom apartment if you don't count my workshop. And that is just a couple of stationary tools plus "stuff".
One thing that strikes me about the somewhat minimalist way I have with stuff is that it opens up so many possibilities. That and the financial ability that if I need something I can just go and buy it helps.
A friend of mine from Guatamala once described to me how the used clothing business works. It's quite the process going from collection in richer countries through sorting, packaging, distribution and out to the people who re-sell the clothes out their back door in poorer countries.
For your old clothes and shoes would perhaps the local Woman's shelter be taking donations? I would expect that your surplus items are all of good quality.
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells