The most energy efficient appliances are rated A++++, but even those rated A+ will still use much less electricity. This is particularly important when buying a new fridge, freezer or air-conditioner, as they use a lot of power. These appliances are often a little more expensive to buy, but are less expensive to run. This means you will make your money back through lower electricity bills.
You can do this by having all your electrical work done by a qualified and competent professional. Having this work done by somebody who isn't suitably qualified is also potentially dangerous.
If you don't, you will be wasting energy and money.
Trying to keep the temperature of a room lower than this will mean you are using more energy than you need to.
A fan uses less power and is cheaper to run.
When you are not using a room, remember to switch the light off. When you are not using an appliance, switch it off. If you leave it on stand-by, it is still using electricity.
These use less power and generally last longer.
Don’t leave them open for too long when you are taking things out or putting them in. If you do, the temperature inside rises and will have to be cooled again; this uses a lot of electricity.