One of the best experiences of my life was volunteering with TEDxHouston last year. Some of my best friends - the Culture Pilots! - are the curators of this independently organized TED event and boy do they do a bang up job.
This was my favorite talk from 2011. Neighborhood Center's Angela Blanchard talks about bringing communities up by building on what they have, not on what's broken. I dare you not to tear up.