You should keep a sturdy ice scraper and snow brush. A small shovel, gloves, and other winter clothing. You should also keep a blanket, emergency flares or reflectors, rock salt or sand, a first aid kit, and rope or chain for those sticky situations. It would also be a good precaution to have jumper cables, a cell phone charger, sunglasses, water, and non-perishable snacks. You never know what could happen and preparedness saves lives.