High Rick and Russ:
If you are heating your garage, Watch out for Mice setting up residence atop your engine and inside your upholstered seats. These areas trap heat. Perhaps begin a good "mouse abatement" program just to be on the safe side. (I have already "abated" a few since October, as it were)
Disconnect your battery from the power cables, even though you may have a kill switch. Bring the battery into a heated area and keep it off of the cement floor. (may be a wives' tale but it works for me).
Some advocate pulling your plugs and spraying some Marvel Mystery
Oil into the cylinders and then (with the coil wire off) turning the engine over a few times to disperse the
oil. I have not done this myself yet. Put the old plugs back in.
I am not fully well versed in the pros and cons of putting the car up on jack stands and taking the load off of the suspension. I suspect this would work best if you also take off the rims and tires at that time to reduce sprung weight. Also would give you a chance to clean the rims and tires and all the suspension parts real nice.
Setting up some sort of heat source or dehumidification could be good. There are these golden rods which are used to heat gun cabinets and safes and motor homes. Again, be careful of mice.
If your garage is not heated and will freeze, then a normal dehumidifier will not work in sub freezing conditions too well or so I have been told. It may just ice up solid.
Most advocate changing your engine
oil and filter prior to lay up for the winter so as to get acids and latent water vapor out of the crank. Makes sense to me.
The use of Stabil gasoline stabilizer in the fuel tank???
I am all ears on this topic and would love to hear what others say.
Thanks for asking that question.