At most times of the year, power outages are merely a nuisance. In the winter, however, they are downright dangerous. Why? Because the whole-home heating systems we use today rely on electricity. Without electricity, well, you're on your own. If your home doesn't have a fireplace and you're reluctant to get a generator, look into options like the Mr. Heater Portable Buddy Heater. Rated for indoor use, the propane-powered unit can keep a 200-square-foot space comfortable for as long as the fuel supply lasts. Available on Amazon; $136.59.