"There's one rule they don't teach you at Harvard Business School: If there's anything worth doing, it's worth overdoing it." Edwin Land By E-MotivasyonEducation and Training Words, Motivational Quotes0 comments ▶Dr. Tayfun Topaloğlu Youtube Instagram: @drtayfuntopaloglu "There's one rule they don't teach you at Harvard Business School: If there's anything worth doing, it's worth overdoing it." Edwin Land