Jumper Cables  Your car battery may run out at some point in your travels. Carrying jumper cables can be a lifesaver in that situation, and it will also enable you to help other determined drivers in need, should you encounter them. A portable battery charger is also an option and potentially even more convenient since you would not need a second car to power up your ignition.
It may seem pretty obvious and basic, but a flashlight can be a connecting thing to have around, especially when you need to fix something at night or if you need to work on something under your car. A flashlight may well be the difference between spending your night in the car and fixing it so you can drive home to your family. Look for one you can push by turning or shaking so you never have to worry about it running out of juice.
Wall compartments and reflective triangles
Since most car crashes occur on the road, car manufacturers should have flares with them to warn other road users, especially at night, and prevent an already bad situation from getting even worse. If you don't have flares, reflective triangles will work just as well and can make a good Samaritan stop and give a hand.
Tire Pressure Gauge
Checking tire pressure levels is something that all drivers should do regularly. Correct tire pressure level increases stability and safety and can even save fuel costs by making your car move more efficiently. A tire pressure gauge allows you to measure which tires need to be inflated or emptied, and how much.
If you get a flat or otherwise damaged tire. It is best to replace immediately with a reserve. Check yours from time to time and make sure you have a tire jacket and iron to help you replace it when you need it. Some tires may require additional keys for access – these keys may never leave the car. If the tire replacement process is too hectic for you, there are options such as Fix-a-Flat, a popular tire inflator and sealer that plugs any leaks and at least allows you to reach the next car shop.
Window Switch and Seat Belt Cutter
In the event of an accident, you may need to get rid of your car. Since a seat belt is designed not to open in an accident for obvious reasons, you should have both of these items in the glove compartment and not in the luggage compartment so you can easily access them.
You may need to clean up a mess or wash away dirt from the windshield. You can also use water as an emergency coolant if the engine cooling system overheats.
First Aid Kit
This is the thing that should never leave your car. When an accident occurs, the most important thing in your car is your emergency response rate. A suitable first aid kit should at least have patches of various shapes and sizes, at least a pair of sterile eye dressings, disposable gloves, safety pins, tweezers, painkillers and cleaning cloths. A first aid manual would be better.
If you see any part of your car moving when it shouldn't be and you have no idea how to fix it, your best option for a short fix might be to duct tape it until you can get someone to check it out for you. You can also use this to keep bandages and patches in place in an emergency.
Without work gloves, performing an automatic maintenance task can expose your skin to bruises and blisters. Car parts can also be oily or dirty – gloves can keep your hands clean while applying some elbow grease.
If you often drive in snowy or muddy areas, If you have a shovel on hand to dig yourself out of a jam, you can save time and cost get a tow.
You may want to clear some maps if you get lost without a mobile connection. Also, it is not a bad idea to have a blanket, with space that allows, if you ever have to spend the night on the road and change clothes if you suddenly rain. Some people stick with cash in the car. You never know when it might come in handy, and it doesn't hurt to be prepared.