What I'm doing to get my greenhouse ready for winter

We are supposed to have a doozy of a winter here in New England. These are the final steps I'm taking to prepare my greenhouse for it:

Larry; many thanks for this. I learnt a lot and your greenhouse project sounds amazing. I’m especially intrigued by the terracota pot heater. I hope your chicken recovers soon. She looks like she’s in very good hands. Best wishes, Gemma