Few handy tips for regular car users:-
Change engine oil as recommended (generally 3 months)
Proper use and quality of lubricants
Check Spark Plug regularly
Check Tire Pressure
Avoid starting the engine in a hurry,fast or with a jerk
Avoid starting the engine until you are ready to pull out
Turn off your air condition for a while in more traffic,on a hilly roads and while planning to overtake a large vehicle
Put car on neutral gear while stopping a while on signal etc...
On red-light if more then 2 minutes halt is required switch off the engine
Do not make habit of resting your foot on clutch pedal while driving
Try to drive at constant speed
Do not give hard acceleration on low gears
Skip a gear (go from 1st to 3rd or 4th) if you are on a flat road or slope
While driving both hands should be kept on handle, left hand on lower left and right hand on upper right
Avoid driving when you are angry or upset
Build up speed before approaching a hill to avoid fuel-wasting hard acceleration while going up the slope
Keep your car neat and clean from inside as well as outside.
You can decrease the amount of fuel your car consume by keeping in mind the steps described above and achieve 40% better economy than most of the drivers.