Store it and leave it alone.
I usually remove my battery and place it on a shelf in the basement. I attach a charger to it at least once a month to keep it topped up. I use the advanced one from Canadian Tire ($69 on sale) that checks the condition etc. I have not lost a battery since then.
Also, when picking it up in the spring, there is an external source to connect to the front trunk release in the fusebox if the trunk has been closed ....
Make sure the tires are over inflated and the vehicle is dry. If you need space ... friend has spaces open in the 401 & Birchmount Rd area ... climate controlled and secure.