Fill the tank up and use a winter fuel stabilizer additive.
Put fresh oil in it (5w-20 or 5w-30 is fine). You typically want to start it up at least once every few weeks to a month. Leave the exhaust open, any moisture that does gets will be trapped otherwise.
Here's a pretty good article although it takes some extremes (removing the wheels completely, removing the battery which makes it impossible to start/run)
Most people that will be starting it while in storage use a battery tender/minder that keeps the battery charged.
Here's a couple I don't see mentioned in the article. Don't use your parking brake and leave it in Nuetral. Parking brake use could cause the pads to stick/corrode to the rotors and leaving the car in gear could make it really hard to get out of gear later on.