Instead of biking to work as usual, I started to walk from home and back with a big Akita dog I am pet-sitting. The walk takes about 45 minutes through a frozen lake. It was -27 C today (with wind chill, it felts like -35 C), and it felts wonderful. The dog spent the day lazying around my office, and it was comforting to have this 125 pound beast breathing slowly next to me...I think I will do that every day until it gets too cold, which is pretty soon. Then I'll be back on my bike, a much quicker commute.