Blog Action Day: Actions Change The World.
The aim of Blog Action Day is "to get everyone talking towards a better future." That's all well and good and might lead me to reiterate my Green Marketing 101 but pontification spread over 15,000 blogs is more likely to get everyone a better headache than a better future.
So stop reading and do something from this list; get your kids involved in this competition; and buy this book. It will only cost you a fiver (which I believe is about $50 at current exchange rates) and should inspire you more than I can. Actions speak louder than words.