What I did:
1) Change the oil for sure, and the coolant if necessary. You don't want your motor to sit in dirty oil all winter. And, you won't want to take the time to change it first chance you get to ride in the spring!
2) Cleaned up the chain. This would be the perfect time to replace chain/sprockets if necessary (which I did right before Christmas).
3) Thorough wash and a couple coats of wax.
4) Seafoam in the tank. But, I don't have the guts to use half a can. I use what is recommended on the can.
5) Invest in a pair of stands. I personally got a couple of Pitbull stands. They aren't the cheapest, but they're built very well. And stable. You will definitely want to keep your tires off of the cement in the winter because they will develop flat spots.
6) Smart battery tender hooked up. You will want something that won't cook your battery (don't ask how I figured that out).
7) Bike cover
Hope for warm weather
Hope that adds to the discussion.