The cost of travel (via car) is interdependent on gas prices. What is your best tip on saving gas money? Below are my top three: 1. Keep tires properly inflated. Under-inflated tires cause a loss of fuel efficiency. 2. Limit items in my car trunk. An extra 100 pounds of 'stuff' in your trunk or tethered to the top also drains your tank. 3. Find a cheap gas station. Driving an extra block to the cheapest gas station definitely saves money.