Some of the old storage do's are probably storage dont's with a newer Z.
Things you could do:
- Change the oil. Used oil develops acids that can attack the engine or so they say.
- Pump in some fresh "ethynol free" gas. Poor in the recommended amount of fuel stabalizer then fill the tank. Filling the tank leaves very little surface area of the gas exposed to air and limits evaporation. A full tank also keeps the tank from rusting from the inside.
- Fully charge the battery.
- Maybe put the car up on jack-stands. This should help keep the tires healthier and limit spring sag.
Oh and get a car cover to keep the dust off of it and the U.V. away.