What makes a concrete canoe float? That question, along with some others, is answered in this NYTimes article today.
Who knew the civil engineers had a whole competition among colleges to make concrete canoes? And it's been going on for years?
Buried in the text is the observation that success in the competition takes a combination of leadership and finding people willing to do the drudgery, like sanding down the concrete so the canoe moves well through the water. Leadership and drudgery are the keys to success in many things, IMHO.