Fit energy saving bulbs
Install thermostatic valves on your radiators
Insulate your hot water tank, your loft and your walls
35% of heat generated in the house is lost through the walls. Installing cavity wall installation to a medium size house could reduce your heating bills by up to £100 per year
By installing 180mm thick loft insulation you could stop about 25% of your heating escaping through the roof
Recycle your grey water
Replace your old fridge / freezer (if it is over 15 years old), with a new one with energy efficiency rating of "A"
Replace your old boiler with a new energy efficient condensing boiler