How to reduce on hydro bill?

Our monthly hydro bill has been reduced from about $250 to about $110 since two year ago. It sounds amazing to reduce more than 50% off the bill for 5 residents in one 4 rooms HDB flat.
Well, we did it!
Here are 10 easy ways to cut down the $$ on the hydro bill in our home in Singapore.

Electricity and water saving:

1. Replace air-conditioner with fan. On an extremely hot day, you may just turn on the air-conditioner for only half an hour to cool off the bedroom if you must.
2. Turn off the light and fan when no one is in the room.
3. Use a lower voltage lamp in the room if it is not used for reading.
4. Light a candle instead of having to turn on the light in the passageway whenever someone needs to walk to the toilet.
5. Open all windows allowing sunlight to come into the room rather than turning on the light during the day.
6. Do most of the housework chores during the day to avoid using the light at night.
7. Do not turn on 2 or more televisions when everybody in the family is watching the same program in different rooms.
8. Plan your linen and clothing washing wisely so that you will not waste electricity and water on small loads of laundry.
9. All showers should not take more than 10 minutes unless you have just fallen into a muddy pit.
10. No computer games.