In our kitchen (which can be seen in part over here) we have open racking storage. To take advantage of the height that each shelf offers, we end up stacking things more often than not.
To keep our finishes clean and safe from harm we use a few dividers that can be found around the house. Some are made from cardboard from packaging (like you would find in a dishware box), some are sponge cloths cut in half and others are knitted shapes. All work equally well, although we love the sponge cloths and our knitted shapes most. The cardboard works great and we do put it to use, although our dishes must be 100% dry before re-shelving (which they should be anyway, but you never know!).
The sponge cloths and knitted pieces are able to be repurposed as hot pads, trivets and obviously to wash dishes! They keep things situated (which is important since we ridiculously close to a large train line) and scratch free! Do you use something along these lines? Let us know in the comments below!
Related: Look! Wall Mounted Pot Rack