Remove the battery to prevent it from dying. You will want to put it on jackstands to get the tires off the ground (or just remove them) if it's going to sit that long because they will develop flat spots. I do the same to my boat and popup camper when I put them up just for the winter. Is this "storage" a climate controlled area like a garage or is it just going to sit outside in your driveway? I would also recommend fuel stabilizer if it's not going to be driven for that long. If a vehicle sits for an extended period of time moisture begins to develop in the fuel tank and the fuel will start to oxidize (the particles separate into layers by density like if you were to pour oil in water). It will also help you start it more easily when you get back. That's all I can think of right now, I'm sure others can chime in with more tips. Good luck!