As an executive, you have to be open-minded enough to do a little self-examination. Great leaders are humble and self-deprecating, and they use that to their advantage to make people below them feel comfortable expressing their ideas, thoughts, and opinions.
When you do this with your EA in a proper way, you enable them to set their superpowers free. You create a safe space between the two of you to encourage them to be a performance multiplier.
Whether you use your EA to boost your project management or as a personal assistant, leveraging their skills can help you work within the scope of a 24-hour work day instead of trying to work a 29-hour work day.