We did final preparations for winter on Sunday (we made the first step last weekend when we disconnected the swamp cooler).
First we winterized the RV, which entailed draining all the water out of the various tanks (fresh water, gray water, and holding) and the pipes, and putting anti-freeze down the drains and into the pipes. Then we removed everything liquid and semi-liquid from the fridge and the cabinets -- bottled water, sodas, ketchup, etc. Last year was our first year as RV owners and we left a few things in there that we shouldn't have -- mainly a bottle of liquid hand soap. We didn't realize that in the extreme cold, the plastic bottle would freeze and burst, spewing liquid hand soap all over the bathroom. What a mess! So this year we took out everything.
We watered the spruce trees and then unhooked the hose and drained that, so it wouldn't have water in it, which would then freeze and burst (we learned that lesson several years ago).
Last but definitely not least, we fired up the furnace -- lit the pilot light and tested the thermostats to make sure everything works.
It's a good thing we did all that because when we got up the next morning, the temperature was 19. Yes, nineteen! It hasn't been that cold since, and I don't think the furnace has had to run any since that night, but it's a good thing we hooked it up when we did.