1. Drive sensibly -- Do not mash the gas when you start up or brake hard to stop. You can improve your highway fuel economy by 33 percent just by changing your aggressive driving habits.
2. Drive the speed limit -- For every 5 miles per hour you drive over the speed limit, you reduce your fuel economy by 5 percent.
3. Selectively use cruise control -- According to Edmonds.com, you can improve your fuel economy by 14 percent when engaging cruise control when appropriate. However, cruise control can use more fuel when use in areas with a hilly terrain.
4. Avoid excessive idling -- Idling your car can consume as much as 1 gallon of fuel an hour.
5. Follow the recommended maintenance -- A motorist should have spark plugs, air filter and gas filter checked before traveling.
6. Keep your tires properly inflated -- Under-inflated tires require more energy to roll and, consequently, more fuel is consumed. Check your owner's manual for the correct tire pressure for your car.
7. Remove excess weight -- An extra 100 pounds of weight can reduce your fuel economy by up to 2 percent.
8. Use the highest gear possible -- When driving at a steady speed, use the highest gear possible.
9. Keep your car clean -- A washed and waxed car has improved aerodynamics and less drag than a dirty car.
10. Think before you open your windows -- Air conditioning uses fuel, but driving with your windows down while traveling at a high speed increases drag on your vehicle. If it is needed, turn on the AC while on the highway, but while driving in town, open your windows.
11. Combine your errands into one trip – Several short trips, all starting with a cold start, can use twice as much fuel as one trip with several stops and may cause you to travel more miles. Plan your trips efficiently.