Never use kerosene or propane heaters inside without proper ventilation. They create dangerous fumes. Also, don't burn charcoal in your house or garage.
Preserve body heat by wearing multiple layers of clothing. Add a hat and blankets to stay warm. Put blankets or towels around your windows and doors to help keep the heat in.
Protect your water pipes during freezing weather by wrapping them with insulation. Also, leave faucets dripping so water won't freeze and crack the pipes.
Your full freezer should keep food frozen and safe for about two days when kept closed.
If someone in your home is on life support, be sure to have a back-up system and a plan of action for during an outage.