When Jennifer V. Miller's daughter started ukulele lessons, her instructor taught her that music is the sum of the interplay of melody, harmony and rhythm. The same could be said of the qualities every leader needs to communicate. Leaders require a core message, supporting points and a steady drumbeat behind them, Miller writes. "In what ways can people 'harmonize' with your message -- by providing support, asking questions, and even pushing back on the theme to gain clarity?" she writes.