How do great managers keep all the plates spinning at the same time?

This question has consumed me, and after 20 years in education and 8 years as cross-cultural team manager, I want to share what I've learned through my mistakes, observation and research.

I have packaged all this up into 15 different 'plates' that you should keep spinning day-to-day as a manager of other adults to manage majestically and even begin to enjoy it!