it is worth noting that many appliances dont draw their full rated power (watts) all the time..... that power rating is the MAXIMUM power consumption the appliance has.
Best way to work out how much your appliances are costing you to run is to install one of these:
http://www.jaycar.com.au/productView.asp?ID=MS6160&keywords=ms6160&form=KEYWORD
... and then you can see how much your whole house is costing you to run.
Realistically, the most costly appliances in your household are:
- air con
- hot water service
- pool pump (if you have a pool)
- halogen downlights
- other household lighting
- fridge
- electric cooktop
- oven
These appliances above will make up for typically 60-90% of your typical household power bill. In fact, a typical pool pump alone will cost you upwards of $100/quarter to run, just to give you an idea.
Best ways to save power/$$ on your power bill
- run your aircon less
- keep your fridge full (the cold food acts as cold brick inside the fridge, hence the fridge has to work less to keep itself cool)
- minimise use of halogen downlights, or use them on a dimmer
- turn your lights off
- use low power lighting alternatives, like energy savers and LED lighting alternatives