Other

Why not considering window shutters. They keep the warm in and make a house more secure.

Venturing out of bed in night for a quick snack or pitstop? Invest in power saving night light or torch. It's easy on your eyes!

As pretty as they are, fairy lights illuminating buildings and trees, are completely unnecessary.

Fit generators to running machines, rowing machines & bicycles at the gym and feed the power to the hot water heaters, lighting, fans, sauna, TV's, computers etc.

Install curtains made of thick material that generously cover the windows. They should be well lined or have a thermal backing.

Fix dripping taps. A hot water tap dripping at the rate of one drip per second wastes approximately 28 litres of hot water per day.

Make these for your doors that have a gap at the base letting the cold air in. You can utilise your old pantyhose.

If you want some ideas how we could life in a more ecological way read the book "Ecotopia" from Ernest Callenbach.

Wikipedia about Ernest Callenbach: http://en.wikipedia.org/wiki/Ernest_Callenbach

Water is made up of Hydrogen and Oxygen. Develope a process that can seperate the Hydrogen from the Oxygen. Develope Gas Turbines that can run on hydrogen and use to power generators.

Build massive solar panel stations in space and beam the electricty down to dedicated reciever stations on earth ( the technology is there ). The power is then sold and distributed.