Small throw rugs are handy but dangerous; someone could take a bad spill if a rug slides from underfoot. For safety’s sake, buy rugs that have a nonskid backing. Or apply latex backing yourself. It’s available in liquid and aerosol form. The liquid is most effective; apply it with a spatula or a stiff strip of cardboard.
You can also buy nonskid pads or padding by the yard to go under rugs. Thin, rubberized nonskid material provides a firm grip; lay it with the textured side down. Be sure to replace padding after it becomes worn.