I used to store my Mustang every winter and here's what I would do. 1/4 tank of fuel with stabilizer additive, change oil (use cheapest oil you can buy and don't change filter at this time, you'll see why later), wax car thoroughly including rims and doorjams, put half a dozen Bounce fabric softner sheets around car (absorbs moisture and smells good), disconnect battery, place wood slabs under each tire to prevent ground contact, cover with a "breathable" outdoor quality car cover (I used covercraft)
Now spend an hour or so drinking beer, staring at your stored car and having sweet memories of the great season that just passed.
In the spring drain all oil out and change oil filter, change fuel filter, flush and fill radiator, polish finish to remove any surface dust, vacuum interior, armor all weatherstripping and tires. Fill tank immediatly with Super unleaded and one dry gas, it will still run a little rough for the first tankful but it is worth it.
It is a little pricey to do it this way but your car will thank you in the longrun.