En route
Easy does it: drive smoothly, accelerate gently and read the road ahead to avoid unnecessary braking
Decelerate smoothly: when you have to slow down or to stop, decelerate smoothly by releasing the accelerator in time, leaving the car in gear
Rolling: if you can keep the car moving all the time, so much the better; stopping then starting again uses more fuel than rolling
Change up earlier: don't labour the engine but try changing up at an engine speed of around 2,000 rpm in a diesel car or around 2,500 rpm in a petrol car. This can make such a difference that all cars in the future are likely to be fitted with a 'Gear Shift indicator' light to show the most efficient gear change points.
Cut down on the air-con: air-conditioning increases fuel consumption at low speeds, but at higher speeds the effects are less noticeable. So if it's a hot day open the windows around town and save the air conditioning for high speed driving. Don't leave air-con on all the time but aim to run it at least once a week throughout the year to maintain the system in good condition.
Turn it off: electrical loads increase fuel consumption, so turn off your heated rear windscreen, demister blowers and headlights, when you don't need them
Stick to speed limits: the faster you go the greater the fuel consumption and pollution. Driving at 70mph uses up to 9% more fuel than at 60mph and up to 15% more than at 50mph. Cruising at 80mph can use up to 25% more fuel than at 70mph.