How To Master Interpersonal Savvy?

At work and in life, the most important skill to master is interpersonal savvy.

Interpersonal savvy is “having a range of interpersonal skills and approaches. It is knowing when to use what with whom- customers, senior leaders, peers, external stakeholders, direct reports.”*

And the most important part of interpersonal savvy that we must master?

How savvy are we relating to ourselves.