Starting with 3rd point in original ans.
3. North Star in life helps in focus and commitment issues. This helps in communication as when to say no confidently.
4. Showing vulnerability, weakness allows the other person to open up ki ye bhi mere jaisa hai. But overdo it and it goes wrong.
5. Some people understand jargon, some simple language, some deep technical stuff. talk in Whatever way they understand, but add your own value in the words you speak. Give your own perspective, your anecdotes, your understanding of right and wrong in their language, isiliye 'their language, your level'
6. Being rooted means developing family and friends where you live, knowing people across professions, shows confidence and people open up to you.
These things are not directly communication stuff but stuff that makes you more clear headed in life. Social skills follow.