Non-skid shelf liner is a must have. Also small plastic baskets keep canned goods, and other stuff from moving around. I wrap the booze bottles in the shelf liner and put them next to each other with no wiggle room. I've had a wood cutting board on my countertop forever with the non-skid stuff underneath and it doesn't move during travel. As for the tension bars, you can buy small, cheap tension curtain rods at Wal Mart. They're much cheaper than the ones specifically designed for RV's. If/when they break, just go get a new one for $2. They work great in the refrigerator to hold everything in while traveling.
2012 Rockwood 8293RKSS
2006 Dodge Ram 2500 Cummins TD
Days camped 2011 61 - Reserved in '12 so far 40