Save money, think about how you drive

Driving on empty
Pride yourself on getting every last drop of gas out of your gas tank before filling up? Cut it out.
Sediment from gasoline settles at the bottom of every gas tank. When you let your gas level run low, you force your car to use the dirtiest gas in its tank for fuel.
The lower your car's gas level sinks, the more the dirt gets stirred up from the bottom of the tank. There's a good chance your car's fuel filter won't be able to catch all of it, especially if you drive with a barely filled gas tank on a regular basis

Revving the engine
This is never a good idea.
Revving is especially bad for your engine if you do it right after you start the car when the engine is cold and all the oil is still down in the oil pan.
Repeated revving will damage your engine and could cost thousands of dollars to buy a new one.
Quick starts and stops
You might like how it feels to floor your accelerator at a traffic light, but all you're doing is wasting gas and putting more strain on your car.
All those abrupt stops aren't great for your car either, and you'll burn through your brakes in no time.

Coasting into gear
Ever roll out of a parking space and pop your car into drive while your car is still coasting backwards? You're being mighty rough on your car.
You're putting stress on the entire drive train. And your car doesn't like it one bit. The first clue is the clunk you'll hear as you force your car to change directions too rapidly.
Do this enough and you may need to replace your car's universal joints, or U-joints. It's also rough on your transmission, and a new transmission could cost you thousands of dollars. Remember to stop before putting your car in drive or reverse.

\Neglecting the tires
Car tires are critical for braking and steering, and they put up with all kinds of owner neglect.
Driving with underinflated tires is a common mistake. When your tires are underinflated, your car won't handle or respond the way it's designed to. When you drive on underinflated tires, you decrease your gas mileage by up to 15 percent and reduce the life of your tires by 15 percent or more.

Riding the brake
People who drive with two feet, the right foot pressing the accelerator and the left foot pressing the brake, often rest the left foot on the brake as they drive. This is a big mistake. Lots of folks end up driving with the brakes on because the "resting" foot is actually depressing the brake pedal. The result? it will make the brake pads wear prematurely, and it will decrease gas mileage because of the drag you're putting on the engine.

Driving too fast for road and weather conditions
You can't control the weather or the condition of a road, but you can control how you drive. When in doubt, slow down. If you're driving in a storm of rain, sleet, wind or snow, slow down.
Monday's storm gave ample evidence of what happens when you drive too fast for the conditions.

Bankrate.com'