1. Reduce Your Speed
One of the best ways to save gas and get a better mileage is to slow down. As you increase your cars speed, you decrease the fuel economy exponentially! The Department of Energy calculates that for every five miles a car owner drives above 60 mph, a fuel efficiency loss of between seven and 23 percent occurs (depending on make and model). By reducing your speed, you save a lot of gasoline and you are also safer on the road.
2. Accelerate Carefully
Stop being a jack-rabbit. Flooring the gas pedal wastes gas and leads to drastically higher pollution rates. Driving aggressively leads to low fuel economy.
3. Travel Light
A good way to get a better mileage is to clean out your car and remove all the unnecessary items from your car. You should use luggage carrier only when necessary. Chevron says, that "For every 100 pounds, fuel economy is reduced by up to 2 percent, especially if you drive a smaller, lighter car."
4. Use Cruise Control
Cruise control will make the most efficient use of the gasoline and electric components of the car. Cruise when on flat roads. The highest gear requires least power. Be sure to use it whenever you’re in free-flowing traffic. Make sure you always avoid using the cruise control on hilly terrain.
5. Check Your Tire Pressure
One of the biggest areas in which manufacturers compromise fuel economy for comfort is in tire pressure. Checking your tire pressure is a total no-brainier. You should check your tire pressure regularly. For instance, make it part of your weekend routine. Tires lose air due to time and temperature. Under-inflated tires are not only dangerous, but they also increase the rolling resistance on the road and that will be robbing your fuel efficiency and lead you to a lower mpg.

Skyrocketing Gas Prices – It’s Time To Save Some Gas!
6. Turn Off The Air Conditioning
AC’s increase fuel consumption and they also have an effect on the environment. The use of air conditioning can reduce fuel economy by as much as two miles per gallon under certain speeds and operating conditions. In addition, keeping the car’s windows down can also increase the drag , therefore affecting the mileage further. Always use ventilates if possible.
7. Avoid Rush Hour
Try to avoid being stuck in traffic. The constant starting, stopping and idling burns a lot of gas and it also contributes to the greenhouse effect.
8. Check Your Air Filter
Air filter is another part of your car that can effect gas mileage. A clogged air filter limits the flow of oxygen into the engine, which harms performance and economy. Air filters are really easy to check; just remove the filter and hold it up to the sun. If you can’t see light coming through it, you need a new one. You should check the owner’s manual to see how often does the car-maker recommend changing filters (usually every 15,000 miles).
9. Avoid The Idle
Besides getting you nowhere, idling in your car can be a serious waste of gas and fuel efficiency – you get 0 mpg. When you idle, your engine is still using gas even though your car isn’t moving (except for hybrid cars, which use the electric motor when idle). If you expect that you won’t be moving for an extended period of time – turn off your car.
10. Drive Less
By avoiding driving your car, you definitely save some gas. Use public transportation as much as you can. Driving and walking is saves you gas, is good for your wallet and health.