A good place to start is by checking your home’s insulation. Make sure there are no air gaps between the floorboards or on the roof insulation. Check your weather strips to make sure there aren’t any air gaps letting the cold air escape. And if you have the budget, replace old insulation with newer and more efficient options.
Insulation can both keep the cold air in and keep the heat from the sun out, which makes it much easier for your AC to reach your target temperature. And the less work your AC motor has to do, the less energy it is going to use.
Something else that can help is to have an air conditioning Kent professional team like this one inspect and service your unit. Mechanical issues can have a big impact on how efficiently your unit operates, which drives up energy consumption. In fact, unusually high energy bills are often an early warning sign that something is not right with your AC.