You can take a start from space heating because it consumes the major part of electricity. Walls and ceiling insulation in your homes will surely help you to save electricity up to 30% on heating cost which equates to 15% of reduction in total cost of electric bill. Although, you need to spend money on insulating materials for different parts of home, yet it will be quite significant in coming days. Extreme weather conditions require indoor adjustment of temperature that result in installation of multiple cooling units and electric heaters. Ultimately your monthly bills go up. In various parts of the world, houses are built with bricks instead of wood that not only save forests from depletion but also minimize the energy requirements of the house. Certainly, several people say that house is not a house if it is not inhabited. So, positive aspects of civilization are necessary to make any house comfortable. We are required to take benefits from different technologies within the house to live in it with comfort. Few people can live without having the facilities of all available technologies. On first position lie the electric appliances that aren't switched off even when not needed. Have you noticed that you don't turn of T.V or lights or Air conditioner when you leave your room for some time? Of course you plan to show up quickly but meanwhile you spend so many units and that too in vain. Ensuring that our house is completely sealed maximizes the use, time and energy saving of our heating devices as it helps in maintaining the temperature. The same is true in case of air conditioning systems. To seal our house perfectly, we need to pay special attention to joints, windows etc. Plastics are the best material to insulate, but on moveable objects we might want to use weather strippers which seal a moveable object from its non-moveable object like doors, windows and garage doors. Since the beginning of human evolution, man has been searching for ways that could work efficiently for him with little effort. The invention of wheel, lever and other simple machines gradually gave rise to modern developments and advanced energy production plants. Windmills have been in use for many decades and used to provide energy to grinding mills.