Flashlight and extra batteries. These may be your links to the outside world. Extra food and water. High energy food, such as dried fruit or candy.
Food requiring no cooking or refrigeration is best.
Extra supply of medicine and baby items. Fuel carriers may not reach you for days after a severe winter storm. Emergency heating source, such as a fireplace, wood stove, space heater, etc. Learn to use them properly to prevent a fire. Have proper ventilation.