Put the plates you are already spinning on the board. They start aging the moment they land — work does not wait for a tap. Come back and tap to keep them up.
The number of plates does not break a manager. The failure to return does.
Put everything that is already in motion on the first board — core work, a new process you started, a deadline that is live. You can add more later.
Tap is a return. Add a line if you want the next visit to have something to retrieve.