To prepare your car for winter, start by checking and topping off essential fluids like engine oil, coolant, brake fluid, and windshield washer fluid. Test your battery, inspect your tires, and consider switching to winter tires. Ensure your windshield wipers are in good condition, and carry an emergency kit with items such as jumper cables, a flashlight, a blanket, and an ice scraper. Properly store your car if you won't be driving it frequently during winter.