Four wire shelves, on casters. Everything on the top shelf used to be on the stovetop along with everything that is still there. My spices used to be waaaay up over top of the microwave. Now they're on the lower shelves of the wire rack, where I can get at them. They are securely corralled in Clementine boxes, which fit perfectly. Their spot will be taken by the grilling stuff, which makes more sense.
The rack fits perfectly in the tiny space in the kitchen, and rolls out of the way when I want to be where it is. A couple of bungee cords keep it secure for traveling.