Personal Experience: Wash well the car before store it (of course), fill full the gas tank, add gas stabilizer, keep tires well inflated and if you keep it in your garage and weather permits (no new snow, no wet/salty roads) take it out for a couple of spins or at least try to turn on the car on your driveway for a few minutes (5-10 mins) if possible weekly or every other week. This helps to maintain ok your battery charge and avoid marks on your tires.
Last, keep the parking brake off just leave it on "1st" (manual) or "P" (Auto) to avoid marks on your Rr disks. Regularly I put my baby out of the road by November
, when temp drops below 5 deg Celsius in my area.
When you return the car on the road (April time approx.), change the motor oil right away.
This advice was given for a guy that is a car collector and so far after made this "procedure" on my "twin" for two years, has been working great...
Hope helps.