Fit draught excluders. Wear warmer clothes. Opt for energy efficient appliances. If buying a cooker, remember that electric cookers cost about three times more to run than electric cookers. Electric grills are particularly inefficient.
Microwave ovens use much less energy than conventional ovens.
Use washing machines and dishwashers only when full. Turn things off when not in use e.g. television, lights. Keep light bulbs and shades clean as dirt absorbs light and uses more energy. An ordinary 100W bulb will last for about one thousand hours. Substituting a CFL bulb for a normal bulb will keep a half a tonne of carbon dioxide out of the atmosphere over its life.