Fuel-efficient driving typically comes down to smooth, anticipatory control of the vehicle to minimize unnecessary acceleration, braking, and drag. The most effective technique is to drive with gentle, gradual inputs and to plan ahead so momentum is used rather than repeatedly starting and stopping. Direct answer
- Accelerate gently and smoothly from stops to keep engine load low.
 - Maintain a steady speed and avoid unnecessary speed fluctuations; use cruise control on highways when appropriate.
 - Anticipate traffic and road conditions: look ahead, ease off early for turns, stops, or hills, and keep a safe following distance to reduce braking.
 - Coast rather than brake whenever safe to do so, and shift to higher gears earlier to keep RPMs low (for manual transmissions, and using eco modes where available).
 - Minimize idling, keep tires properly inflated, remove excess weight, and reduce drag (close windows at highway speeds, use A/C judiciously).
 
If you’d like, I can tailor these tips to your vehicle type (gasoline, diesel, hybrid, or electric) and typical driving scenarios (city, highway, or mixed).
