When you’re purchasing a car, you put a lot of time and energy into finding the best deal for the vehicle you want. You research online, haggle with the salesperson, and walk out of the dealership if they can’t meet your price. While it’s important to get the best deal on your initial car purchase, most people waste what they saved during negotiations on poor driving habits. What you do with the five to 10 years that you own your car will have a much greater impact on your wallet.