Stacking pans as opposed to nesting them means you can remove one without having to remove them all. Turn a vertical bakeware organizer on its end and secure it to the cabinet wall with cable clips to prevent toppling.
Four-sort dividers, containerstore.com. Top shelf, from bottom: Professional Tri-Ply nonstick frying pan, 10"; and Professional Tri-Ply frying pans, 10" and 8"; by Martha Stewart Collection, from macys.com.
I used a "Corner Organizer Rack" (which has 3 shelves) to store my non-stick frying pans -on the top shelf of a CORNER kitchen cabinet. No need to secure it, the weight of the pans holds it in place. It can be removed for cleaning or to rearrange items.
I have one of these racks in my UPPER kitchen cabinet, on the lowest shelf, to store a set of plates. Dinner plates on bottom, luncheon plates plus bread & butter plates - all within reach.
Buy at Container Store, Wal-Mart
This is a great idea for those bottom cupboards that don't get used because they are so deep you can't see what's in them or you have to take half the things out to get to what's in the back.
I don't have room for those racks in my cupboards. I use paper plates to separate my pans and prevent scratching.