For anyone browsing Malachain, here is a clear starting point on the subject.
An electricity bill measures energy in kilowatt-hours, which is the energy used by a one-kilowatt appliance running for one hour. A two-kilowatt kettle running for three minutes uses a tenth of a kilowatt-hour, while a fridge running all day uses less power at any moment but adds up over time. Knowing this makes it easier to see where the money goes.
Most bills combine a price per kilowatt-hour with a fixed daily standing charge that is paid regardless of use. Compare your usage month by month, and read the meter yourself if the bill shows estimated readings. A simple plug-in energy monitor reveals which appliances consume the most, often highlighting old freezers, tumble dryers or devices left on standby.
It also helps to talk the subject through with friends or colleagues who have tried something similar. Their experience points out the details that guides leave out: how long things really take, which costs were unexpected, and which shortcuts turned out to be a mistake.
There is more to learn on this subject, and the linked website goes into greater depth. Treat this article as an introduction rather than the final word, and check any important decision against up-to-date, reliable sources before relying on it.
If you try any of these ideas, start small and adjust them to your own situation. What works for one person will not suit everyone, and it is fine to keep only the parts that help. Writing down what you changed, and what happened, makes it much easier to see after a few weeks whether the effort was worthwhile.