Move the bed and place an area rug that is slightly larger than the dimensions of the bed in its place. Choose a rug with a slightly plush pile to create the most resistance under the bed's feet. Return the bed to its previous position.
Attach a set of non-skid furniture feet to the bottom of each corner of the bed frame. Furniture feet come in a variety of sizes for different types of furniture and can be purchased at hardware stores, furniture stores and home improvement centers.
Cut four sections of heavy-duty rubberized shelf liner -- it's the thick, squishy stuff, not the thin sheets -- that are slightly larger than the feet or casters on your bed. Slide one section of liner under each foot.