Do not exceed the indicated speed limit.
Do not open your window when travelling especially at high speeds.
Avoid packing items on top of your car.
Take the aerodynamic shape of your vehicle into account when buying your vehicle.
Inflate your tyres properly.
Prefer rib type tyres which are better with regard to rolling resistance than block type tyres. Choose low aspect ratio tyres which are stiffer, allowing for less flexing under load, thus they typically have lower rolling resistance compared to high aspect ratio tyres.
Buy second hand, good condition tires.
Choose a vehicle suitable for your needs. Do you really need a power-hungry car?
Using 4-wheel drive reduces fuel economy. Prefer to use 2-wheel drive cars.
Remove the excessive weight from your vehicle.
Fuel also contributes to weight.
Plan your journey more wisely. Take the amount of traffic, possibly congested routes and the time of the day into account.
In cold weather, wait for the engine to warm up a bit.
Incorrect axle alignment influences rolling resistance and increases fuel consumption.
Prefer not to drive when raining due to water drag effect as you drive on the road.
Stop aggressive driving.
Do not over-rev.
Gear fast, run slow and accelerate slowly.
Avoid unnecessary idling. Turn off the engine if you anticipate a wait.
Use overdrive gears and cruise control when appropriate.
Any electrical equipment in use worsens the fuel economy of the vehicle with air conditioning being the biggest culprit.
Exploit the force of gravity when going down the hills.
Avoid coming to a complete stop whenever possible.
When approaching red traffic lights, either let the car roll itself on gear or select the neutral gear to roll it.
Keep your engine tuned. Tuning your engine according to your owner's manual can increase gas mileage by an average of 4%.
Change your oil regularly.
Check and replace air filters regularly.
Consider the alternative vehicles.
Hybrid Electric Vehicles offer another option for car buyers. These vehicles combine the benefits of gasoline engines and electric motors and can be configured to achieve different objectives, such as improved fuel economy and increased power.
Consider using the public transport such as underground, overground or bus.
Use a bicycle or just walk if your destination is near.
Get in the habit of saving all your fuel receipts, recording distance travelled and fuel economy (MPG).
Leave for your destination a little early so you don't feel pressure to drive faster, brake later and otherwise fall back into bad habits.
Travelling at a constant speed on a freeway within a flow of traffic (in the same direction) is more efficient than going the same speed in isolation.
If you regularly travel the same roads, make an effort to memorize.
In multi-lane traffic, choose the "lane of least resistance" to avoid unnecessary and unpredictable braking/changes in speed.