Marilyn has a couple of good ideas for organizing. I like the way she has placed earthquake bars across her shelves. Not as much for earthquakes, but for small children pulling cans down onto their head.
I also liked the can control system. I found a similar gadget on Amazon.com that automatically rotates cans on a first-in-first-out basis. It holds small and medium-sized cans and is better for small spaces.
This system holds 54 cans and it is taller. It also works on a first-in-first-out basis, and will hold soda cans.
The last one that looked interesting was the organizer that is made of heavy metal wiring with chrome finish. It fits most sized cans.