answer:I used to turn all lids inside out in the matching pot and then stack them. When I was by myself, I had fewer pieces of cookware, and this worked fine. When my husband and I merged our nonmatching cookware, we nested the pots and skillets in two stacks (nestability determines which stack) on a wide shelf and piled all the lids in between them. This has worked well for some 34 years. I put the large glass lid underneath the largest stainless steel one, so it rests directly on the shelf. There are actually very few avalanches. I made a number of round pads out of quilted fabric edged with bias tape, and I line each of the special coated surfaces with one of those so it doesn’t get scratched by whatever nests inside it.