Change oil before storing it.
Fill the tank with fuel and add fuel stabilizer. If at all possible, store it indoors, even if it isn't heated.
Tires will loose roughly 1 lb of pressure every month or two and the pressure will drop with the temperature so make sure the tire pressure is checked bdfore storage and perhaps leave them as much as 5 lbs high. If possible, place on jack stands to take load off from tires.
If parked outside, if possible, remove battery and store inside even if not in a heated area. Trickle charge battery at 2 amps overnight before reinstalling. Do the same if the battery is left in the car.
Confirm condition of coolant including that it will protect low enough for storage conditions.
Top off all fluids.
Put it away clean, with fresh wax if possible.
Cover if you can.
