You'll save yourself time and money. Do not rest your left foot on the brake. Other good habits Tighten up that gas cap. Make sure it's on securely. Buy a new one if your current cap doesn't fit snugly.
Gas easily evaporates from the tank if it has an escape.
Buy a fuel-efficient car. When pricing cars, factor in long-term fuel costs. Keep in mind that sunroofs add to wind resistance, lowering the mileage per gallon. Be smart with the air conditioning. On the highway, closed windows decrease air resistance, so run the air conditioner.