Don't leave a full tank of fuel in it or it'll go off and drive like crap, then end up posting on here about why your Cossie's sick after being left for 6 months. Leave a dribble, or enough to run it a bit.

My winter Cosworth procedure goes like this: leave tow rope and jump leads in boot, check coolant, oil and fuel. Drive. Simples.

Personally though if I were to have the luxury of a garage, I wouldn't disconnect the battery lead - they're easier to nick when the alarm's not squealing for attention. And it's an arse re-programming the radio stations.