Some of our electronic equipment in the home and at work is on for long periods of time, like fridges and freezers. Other items use a significant amount of energy when they are in use, like washing machines, dishwashers and tumble driers. It is important with these items to get the most energy efficient item possible as they will use less energy, cost less to run and save money in the long term. They may cost a little bit more to purchase, but because they are used regularly that extra cost is saved in a relatively short period of time.
The Energy Saving Trust has an exhausutve list of appliances to choose from here: http://www.energysavingtrust.org.uk/Compare-and-buy-products
Look for the logo on the right and also at the energy lable - you should be choosing A-rated equipment. In the case of fridges you could be looking for A++-ratings.
Some interesting facts and figures:
We spend over £2 billion each year running washing machines, tumble driers and dishwashers. Another £2 billion is spent on running cold appliances.
Washing at 30oC can use 40% less electricity.
An A* rated fridge uses 60% less electricity than a G rates appliance and could save £36 a year.