As my colleagues, bosses and clients said, if a mission (task) is impossible: it's Better Сall Drabkin.
In addition to standard briefs, I often take on very complex projects with impossibly short deadlines or too many stakeholders located in different parts of the World. So all my teams and I successfully created ideas with sustainable development input even under stressful conditions, then sold and implemented them. You know, these projects got great results and won some awards.