1) Pretreat the windows with Ice Blocker or something similar.
2) Cover the side mirrors with plastic bags.
3) Cover the windshield wiper blades with garbage bags.
4) Leave the wipers extended out (not up, but out, as if you were changing or cleaning the blades).
5) Keep de-icer spray and a good ice scraper handy in case the windows do ice over. Don't pour hot water on the windows to melt the ice. (If you do, you won't have to worry about the windows icing over again.)