[Flofocus]

Fill up the tank, make sure its full of gas, you don't want condensation building up and causing rust. Throw is some fuel stabilizer if you want - but I think that's a little overkill.

Throw some bounce sheets on the front & rear floors, smell nice and rodents hate that stuff.

Fill your muffler tip with steel wool so no rodents try and get in and make a home.

And as mentioned fill up the tires an extra 10 psi, I actually inflated them to max psi. I've never jacked up the car when storing my cars, never had issues with flat spots.