Use a microwave. Generally a microwave oven is the most efficient way to heat up and cook food.

Use the sun to reduce your heating bills. Leave internal doors open to rooms which trap the sun so the heat can spread to other areas.

Only fill your kettle with the water you need. You will save both water and energy.

Insulation prevents heat moving in and out of a building. This makes it even more important for buildings with cooling systems which can benefit in both hot and cold weather.

Switch off radiators in any rooms you are not using regularly and keep internal doors shut to save energy.

Still using tungsten, halogen or fluorescent bulbs? Changing to LED lighting can save energy and money.

Keeping extract fans and vents clean and clear from obstruction reduces energy use and makes then work more efficiently.

Cavity wall insulation can help prevent heat loss through your walls. Consider getting this retro-fitted if you still have uninsulated walls.

Are your heating costs literally going through the roof? Check to ensure you have 250-270 mm of loose roll loft insulation and top up if necessary.

Litter belongs in bins! Stuffing litter behind radiators not only prevents them working efficiently but can also be a fire risk.