Insulation for buildings would be a great start. na more research, etc, for alternative energies, and to reduce consumption in private, State and industrial installations- better link-ups between all of them- and appliances and industrial machinery which use less energy.
At a simple level, a few examples from top of head. Think of washing machines and appliances 20 years ago- they used much much more energy than mordern ones. Our vilalge is changing street lighting for a modern version that uses a fraction of the energy compared to old ones, and lights will be dimmed by 40% between 11pm and 6am. The local composting plant creates enough heat for a whole estate of highly insulated, low energy use homes- and gas is created by cow manure being collected. Much much more could be done if emphasis and MONEY was spent on how to use energy better, rather than more and more. It does NOT mean going back to candles and horse and cart. BTW, look at modern cars and the change in technology too. Very proud too of our Bertrand Picard and his research into solar planes and machinery via Solar Impulse, etc.
When I also think of all the vastly over heated shops with the doors wide opened all winter- and all the outdoor gas heaters in pubs, etc- it's cryzy- and illegal in many European countries too.