We have a rectangular pantry with shelves. 4' wide 4' deep 5' tall. Recently bought cans (of various sizes) and boxes (of various sizes) tend to get mashed into the front; the back slowly accumulates with old food and is eventually deemed too old to eat, and thrown out. Very wasteful. What organizational devices make it easier to eat the older food first, to follow the FIFO rule? A lazy susan, being round, would waste a large amount of space in the corners, and would still leave the center to fill up with old food. But maybe that's my best bet? As you make recommendations, keep in mind that the wife is the queen of the kitchen, and any system must have her approval for "ease of use." If it's not easy for her to do, she won't do it. (I say that in the most loving way, but it is what it is.) Previous attempts by me to organize our pantry have been met with the grumpy face, which means, "What are you doing messing with my system? Now I can't find anything."