when you are not using them. Up to 30% of power used by TV is used while they are turned off, so buy power strips and just flip the switch on the power strip, because they use far less energy while turned off. An extra layer or blanket will not only keep you cozy but will help to reduce your electricity bill significantly. Insulation keeps the heat and cool on the correct side of your living space. Consider not only the ceiling but also the walls and under the floors. Keep windows and doors closed properly to avoid the loss of heat in winter. Open the windows in summer. The cross breeze will often keep you cool and flushes out stale air (indoor air is often more highly polluted than the air outside). Importantly, the use of fresh air to cycle through your home saves the cost of running an air conditioner. Using only air conditioning units can be inefficient, but pairing fans and air conditioning will significantly increases effectiveness of temperature control. The fans will circulate the warmed or cooled air generated by the air conditioning unit. Gaps reduce energy efficiency in a home. By caulking gaps around windows and doors, you increase the ability of your house to retain heat and cool at the right times of year, allowing your heating and cooling systems to work less. They last longer and consume one-quarter of the energy. Lately, LED lamps have started to pick up the pace too -- they are up to ten times as effective as fluorescent, and totally blow incandescent bulbs off the charts. Always turn off the lights when you are not using them. Rooms that are lit with nobody in them are wasteful.

TL;DR in Indonesian:
Matikan peralatan jika tidak digunakan. Turunkan termostat (alat pengatur suhu) beberapa derajat ketika cuaca sedang dingin. Pastikan rumah Anda tertutup dengan rapat. Manfaatkan jendela untuk mengatur suhu. Gunakan kipas di langit-langit untuk menggantikan AC agar ruangan tetap nyaman ketika cuaca sedang panas. Tutup celah yang ada di rumah. Beralihlah ke bola lampu fluoresen. Matikan lampu. Belilah baterai isi ulang untuk perangkat yang sering Anda gunakan.