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8. Try not to stomp on the gas anymore than you need to.
Aggressive acceleration equals maximum gas consumption. The slower you accelerate, the better your gas mileage will be. On the other hand, if you creep along like a snail, the drivers behind you will get mad. Experiment with how little "pedal" your car needs to move at a reasonable traffic speed and save your gas.

9. Likewise, try not to slam on your brakes.
The more you brake, the more you have to accelerate afterwards, and that costs money. Accelerate smoothly and brake soothly. Ideally you want to accelerate once, and then drive at a constant speed until you arrive at your destination. There are too many moving pieces to get stopping and starting patterns right every time, but the closer you get to constant speeds, the more gas you will save.