“My name is Noah Wasserman. I made a mistake that impacted your lives.”

A year after Theresa Greenfield failed to qualify for the Democratic primary ballot in Iowa’s third Congressional district, her former campaign manager apologized in an unprecedented full-page advertisement in the Sunday Des Moines Register.

Wasserman’s account of how he derailed a promising candidacy conveys valuable lessons not only for people working in politics, but for anyone who feels overwhelmed by tasks at hand.