Keep dust off and maybe even save it from some scratches. Consider cracking a window under a cover and a little dish full of baking soda will absorb some of the mositure and contain any smells. If you remove the battery, put it on a block of wood, not just on concrete or it will drain itself. Changing the oil before you store it just in case. Starting it up and maybe driving it on nice days won't hurt. I never understood storing a car for the winter though, just be careful with itl