In a recent article for The New York Times Antanas Mockus, the former Mayor of Bogotá who served two terms in office between 1995 and 2003, discusses what he learnt to be "the art of changing a city." Mockus, a professor of philosophy by vocation, was at times pressured to wear a bullet-proof vest — which he wore with a heart-shaped hole cut over his chest as a "symbol of confidence, or defiance, for nine months." His article discusses how his government tackled Bogotá's "chaotic and dangerous" traffic through a thumbs-up, thumbs-down card system performed by mimes, how they dealt with water shortages, and how they persuaded 63,000 households to voluntarily pay 10% more tax.
To read more about Mockus' methods, read the article in full here.