I usually do this for the winter months for my own ride:
1. Fill the tank with Stabil and gasoline
2. Put the car up on blocks by the suspension so (as Darius said)
it's not all dangling by the struts and shocks.
3. Remove the spark plugs and put 1-2 tablespoons' worth of SAE 30 oil
into each cylinder, then put the plugs back in.
4. Use rat poison. Lots of it. Like it's going out of style tomorrow.
5. Put some silicone spray onto a paper towel, and put a nice coating of silicone
onto the weather seals, especially around the doors. This will keep the seals pliable
and will keep moisture from building there and freezing.
6. Remove the battery, just in case something decides to short out.
7. Be sure the antifreeze/water mixture is correct for your climate, and that it is
up to the proper level. I use 50/50 and have had no problems whatsoever. This is
the recommended mixture for most vehicles in North America.
That's all I have, and hope this helps.
