The PMO leader/project manager sets the tone for meetings and each should be treated as a production. As an example, take three back to back 30 minute project meetings with mutually exclusive topics/ team members in a program. Each needed to be treated as a separate production and as the director, there was a need to ensure preparation for each individually. Mental capacities were stretched after completion, but in the end, success was achieved by keeping the topics uniquely identified from the other!
PMI Talent Triangle: Power Skills (Leadership)