Using energy efficient lightbulbs is one of the easiest ways to save energy and money. Every bulb you install will save you between £3 - £8 per year, and unlike conventional bulbs will last for around 10 years! These are available in a wide range of shapes and sizes now, and most warm up within 10 - 15 seconds of being switched on.
When you are buying a new electrical appliance, look for the Energy Saving Recommended logo which shows the product has been tested by the Energy Saving Trust and is not an energy waster. Many products now display energy performance labels which give the appliance a rating from A - G depending on how efficient it is (A being highly efficient and G being poor efficiency). Its worth investing a bit more to buy an efficient appliance, as over the life of that appliance it is likely to pay you back your investment and more in savings on your energy bills.