Three winters ago I pushed my cold weather thresh hold down 10 degrees to 10F to allow for more winter commuting. I did this mostly by dressing lighter, but smarter, thanks to bikeforums. Two years ago I added studded snow tires to better deal with the ice that lingers on the shaded side streets I favor. This allowed for more winter commuting.

Lights, clothing, equipment, strategies...I can't think of anything I will do differently this winter...but there is always room for new goals and more improvements.