I live in Maine so my Ferrari is in an unheated garage from the end of Dec. to the end of March. What I do, like Spasso says, is change the oil and check the anti-freeze before putting it up. I also fill the gas tank and add some fuel stabilizer like Sta-bil and run the engine so that the stabilized fuel is in all the carbs. Then I take off the air filter cover and while the engine is running I spray some fogging oil into each of the carburettors until I get a thick white smoke coming out of the tail pipes. At this point, the engine is shut down for the winter. I pull the spark plugs, spray some fogging oil down each of the cylinders, roll it over with the starter and then re-install the plugs. I pull the battery out and store it in the basement.
In the spring, I throw the battery back in her, start her up and I'm good to go.