Another Genius Idea from Martha in my inbox this am.
Pots take up the least space when you nest them, but that leaves the lids with no place to go. Give them a home of their own by installing metal towel bars inside your pantry door. Don't use fancy or bulky bars -- look for simple ones that stand out about 2 inches; mount them only to the rails of solid-core wooden doors. To hang a lid, slide it behind the bar so the knob or handle catches and holds the lid in place.
Idea snagged from Martha's site.