RWD in winter question

For those of you who drive a RWD car in winter (where it snows obviously), do you put weight on your trunk and if so how much do you use? Also are there any other precautions besides good snow tires? I live in Western PA and might be driving a 97 V6'S mustang for reference. Thank you in advance. via /r/cars http://ift.tt/2vj2HET