Hi Aziz,
There are loads of ways that you can cut your bills. Try:
* using energy saving light bulbs
* making sure your home has the correct insulation
* having your boiler serviced every 12 months
* switch off appliances that are not being used
* making sure you're on the best tariff for your needs
For more information - and more tips! - visit www.npower.com, http://wallaceandgromit.npower.com/top-energy-saving-tips.html or www.energysavingtrust.org.uk