Turning down the thermostat and being careful with fuel use is a good idea any time, but in World War II it was a matter of life and death. Most of the recommendations in this poster still make sense: Winterizing your home, including insulating walls and ceilings, installing storm doors and windows and weatherstripping. Checking and cleaning your furnace can save a lot of energy, too.
But the Order Fuel At Once recommendation needs a bit of explanation.
Next: Don't Shiver