Well seriously, jack the car up slightly so the tires won't get flat spotted.
Dump a thing of fuel stabilizer into a full tank of non-ethanol gas and let the vehicle idle for ten minutes or drive around.
Some kind of varmint deterrent scattered around the car, preferably the car is not on grass. I hear mice hate dryer sheets?
A car cover. UV light is the ultimate destroyer of rubber.
It wouldn't hurt to pull spark plugs and douse cylinder walls with WD40.
Pull air inlet hose between filter box and intake, seal intake with plastic bag and duct tape/zip ties.
Disconnect battery, place battery tender on it.
Man I wish I had worked harder to be car free, we were really close to it a few years ago but then I took a job 15 miles outta town.