A recent birthday gift of some wonderful, heavy-duty cookie sheets had Rob reconfiguring our vertical kitchen storage this week.
I'd previously used tension rods between the shelves to try to corral pot lids and cookie sheets, but they were no match for the weight of these heavy-duty, made-in-America, restaurant-grade cookie sheets. 
So, Rob measured the distance between the shelves and created a permanent vertical organizer for the cookie sheets using a pine 1-by-12.
He put a little wood glue on both ends of each divider, and slid it between the shelves (he didn't clamp them, because they fit snugly) . He kept the dividers in place by gluing two small wood strips to the top shelf, to keep the organizers upright.
He said if he was going to do it again, he would have glued and clamped the small support strips, and slid in the dividers after they dried.
Between that, and the fact that my Paderno pots and pans  can be hung with the lids on their handles, we're now using our shelf space much more efficiently.
There's so much extra space that I moved my blender to the other side of the bottom shelf, and still have room for either another small kitchen appliance or another organizing nook that could contain more baking sheets or something with a similar shape.