How is this for a great idea? Treehugger online is running a competition for best video about some easy ways to do something about the climate problem.
Treehugger has been around for a while. I have always thought that Treehugger was a bit overly consumerist (in a "buy this wind up torch! buy that dinky solar powered electric toothbrush and you can save yourself when the end of the world comes! "... kind of way).
But this video competition actually is a really cool idea. And it is great fun watching the entries. Check them out.