Change the Oil and Filter
Clean/Replace the air cleaner and pre cleaner
Grease the fittings
Charge the battery and keep the battery tender handy and ready for use
I also install my winter cab enclosure, with extra Gloves, Jackets and Hats.
I use my JBjr year round, this year I purchased the snowshoe for it, so it's ready for snow removal duty.
If the snowthrower is needed it is cleaned and lubed with extra shear pins and an extra belt.
I also have about 20 gallons of gas on hand.
I guess I'm ready for whatever winter brings my way.