@johnbishop Oh, I started with my own...no longer used art and sewing stuff, went on a fabric diet like Ginger, purged my closet and dresser multiple times, my garden stuff. Next step was kitchen and dining - found new homes for no longer used handed down dishes and silver, set a "baseline" quantity for storage containers, canning jars, boxes, etc.
Last year came a natural starting point for my "boss" - he acquired a 3D printer and all that goes with it, so he had to tackle his workroom to make space. All the obsolete computer parts and equipment went away in two weeks! Still more shelves to tackle, but you can see the floor, most of the workbench, and get to the closet.
We also unloaded 2 Highlander loads of paint, chemicals and other bad stuff at the city hazardous waste day, started on the garage together and supplied the local church garage sale with two loads of fabric, tools, luggage and assorted treasures.

I figure 2 more years to finish it all, then go back to see what hasn't been touched since we started...

@gingerw I totally get the hoarding after a catastrophic loss, but ironically saving stuff won't spare her from losing it all again. My friends lost their home and 90% of the contents right after retiring, and it had the opposite effect on them. It made them less attached to things. She now lives seasonally in 2 tiny homes 1500 miles apart, content with a few beloved heirlooms supplied by her sister and his, and she says she feels "light" because of it.
I don't think everyone needs to be minimalist, just be aware that there can be a blessing in having fewer possessions and more space.