Skip #4. You do more harm than good running a bike in the cold. If you run a bike in the cold, it's recommended that you RIDE the bike to get it to full temps, but that you also cause heat throughout parts like the trans, where condensation forms in the air space of the box, and water contaminates the oil there was well.
If you're gonna go out and ride it.....ride. Don't start it up, otherwise.
As well, if parked on cement, place carpeting or someosort of moisture barrier under the bike.
If you have critters in your neck of the woods.....place mothballs in the exhaust, or dryer sheets. Small rodents can crawl into pipes and nest. If baffles are open, they've been known to crawl up to the heads. Rodent urine is corrosive and their nests can mess an engine up. I take 2-3 mothballs and wrap then in a dryer sheet, and tie with a bread-twisty. Place in open end of pipe.
“When the going gets weird, the weird turn professional....” ~ Hunter S. Thompson~
R.I.P. Rubberdown. 1971-2012