Having a membership to Sam's Club or Costco can be a big savings, too. It's the only way to fly in terms of buying breakfast cereal, for example, and if the Sam's or Costco near you has a gas station, it's worth the yearly cost of membership just in gas savings. (I find that the Sam's near me is usually 8 cents/gallon or better cheaper than the nearby gas stations, and that adds up surprisingly fast, presuming you're not driving significantly out of your way to get there.)

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Quote Originally Posted by Spookitie View Post
The way you drive can make a huge difference on your gas. COAST as much as possible. I don't mean cruise control, I mean letting off the gas on the way to red lights and easing up to speeds.
This can be huge. The difference between cruising at 70 vs cruising at 60 can be several miles per gallon, depending on your car. Also, regarding coasting, if you're driving anything built reasonably recently with a manual transmission, the engine control computer will actually shut off the fuel injectors while coasting (in gear, foot completely off the gas, the car's momentum keeps the engine turning rather than the engine moving the car), meaning that whatever distance you travel while coasting is actually free, at least in terms of gas.