Staying warm. In the winter, I used to stay warm by turning up the thermostat. Then I discovered (via HN) the Low-Tech Magazine article, "Insulation: first the body, then the home." [0] The article argued that it's much more efficient to focus on heating yourself rather than your whole living space. I invested in high-quality wool clothes that I wear in layers and warm slippers. Now, I keep my home about 5 degrees F…
The scarf goes on the inside of the coat.
If you put the scarf on the outside, like you think you've seen in TV and movies, it's just decoration. Put it on the inside and it's an insulation layer and it blocks the cold air from blowing down your front. Absolutely game-changing. (Also, have a good coat, but that one seems more obvious to people.)