Some fantastic ideas compliments of Ted.com.
The first is a guy who has created a windmill in Africa to help power his local area. He basically constructed it out of junk... Brilliant! Resourceful, Decentralising and Self-Motivated. He embodies the aim we should wish to be self inventors and self-taught, how much more satisfying is it to solve one's own problem with the resources [or lack of in this case] around you.
This next guy is also fantastic, along with his colleagues they have created the idea of using humble kites to create electricity. In fact amazingly, this can produce more power than a wind turbine, and presumably would also be far cheaper, more mobile and in shore far less intrusive than wind farms with a far greater out put.
The next gentleman has a novel idea in reference to cars. What is great is that not only is the car creates no pollution, but it is also capable or re-energising the grid. Although I would argue that we need to be removing away from cars as they cause just as many problems as they solve - this intermediary innovation could help developing countries utilise our old cars whilst we move on with technology to bigger and better and in effect create a recyclable hand me down while technology integrates across the globe.
Finally, the most interesting and yet again thought provoking comes from the guys and gals all working on fusion. It has been done (1997) which is backed up in the video. This is where most commercial enterprises I'd have thought would be sticking money into as this is the big one. A massive amount of energy for an incredible long time with virtually no pollution. This concepts are stepping stones in what it is I personally am usually recommending, as simply increasing energy is a rather childish approach. One must look at where energy can be reduced, redirected and reinvested for overall [Holistic] beneficial approaches towards humanity - not just build more wind farms and solar panels jobs done.
*This may be the older video, if this is the case search for the newer video as it is easier to understand him slightly better.