SAD..Seasonal affective disorder.. how do you northern guys deal with it?

I go to work in the dark, and come home in the dark, but I spend most of my day outside, which helps, except when it's brutally cold, as next week is expected to be. Watch a fair amount of tv and movies in the evening. I try to get out and do something physical on the weekends, even if it's just taking my dogs for a good long walk. I get to look at my Dart every time I walk in or out of the house as it's parked 20 feet from the door, that doesn't help much.