I guess Clifford Stoll is the most hyperactive human being on this planet. I found his talk about everything so good and inspiring. The thing that resonates the most to me is: “Think local, act local”. The world is so complex. If you try to reach too high you end up doing nothing. So just consider what is in front of you, make a small contribution and things are much easier in this way. And in the end you may contribute much more than if you try to reach for the stars.