WW, every so often (but not often enough) I'll get in a frame of mind to go through a room or two and ask myself "If I was moving, would I want to drag this along?" Usually the answer is no.
I tend to hang on to magazines too long. Not a lot of them, but I have about a dozen Mother Earth News on my computer desk bookshelf right now. They're probably 3 years old if not older. I have no plans of building a chicken coop or crafting my own garden hoe, so I don't know why I hold on to them.
We seem to have amassed a large collection of markers, colored pencils, and loose leaf paper too.
I want to get rid of curtains too. They're just giant dust collectors. You can probably relate to that with the pets and their shedding ending up on them.