We use the rubber shelf liner between plates, bowls, etc. It not only helps keep things in place, it also keeps them from rattling, which is important when driving a motorhome. I've also used the cabinet bars vertically, to keep things from moving forward, which is the natural direction for them to go when driving down the road. Small plastic baskets help keep the smaller items in place, too.
Larry, Paula & Bailey the Adorable Red Toy Poodle