Can I assume we are talking short term storage here, as in a few months until the snow/ice thaws?? HIBERNATION?
If so, nothing major needs to be done to prep the car.
* Full tank of gas helps, but isn't neccessary, but put some gas additive/cleaner in the tank to absorb the moisture before you take it out of hibernation.
* Change oil in the spring before any hard trips or drives
* Check all fluids before starting
* Top off all fluids before hibernating
* If possible start occassionally during the winter and get it hot, pump brakes. Open heater when running & hot (to circulate coolant thru the heater matrix). Also run A/C during these warm-up sessions.
* As suggested a trickle charge is good. You don't want the battery to go flat (will significantly shorten battery life).
That's pretty much it... Tires may get a flat spot that will go away within a few miles of driving.
Not a biggie...
Kiyoshi