Here are a couple more:
!. disconnect battery and fully charge and connect to trickle charger making sure battery has sufficient water.
2. Change oil and filter. Lube grease points.
3. Slightly overfill tires or put up on blocks with the weight of the car supported by suspension.
4. Clean and wax.
5. A car-cover would be nice.
6. If weather permits, start/drive it occasionally. This really helps prevent brake problems.
7. Itch for Spring.
Come to think of it, you could move to sunny Southern California!
LCJUTILA