My observation is that most people are out of balance in their skills. They are either great expressers and mediocre listeners, or they are great listeners and mediocre expressers.

Tactics: 

1.  Check how balanced you are, then hone the skills on your "weaker side".  (Ask a trusted friend, "How am I at . . .?")

2.  Read a "how to skills book" for new behaviors.

3.  Practice in everyday life.

To be a master converser, you need a balance of the "yang" mode (speaking) and the "yin" mode (receiving/listening.)

Many people assume that conversation is mainly "the gift of gab" - verbal fluency.  However, . . .

One of the greatest conversers in human history, Socrates, was mainly known for asking questions and listening.

Another great converser was psychologist Carl Rogers, who asked a few questions, then listened.  (He originated the process of "active listening" - paraphrasing to check and confirm accuracy of meaning.)

Playwright Oscar Wilde was a brilliant expresser.  Witty, poetic,

philosophical, entertaining.  But he was a terrible listener because he was so self-absorbed, arrogant, and thought himself superior.

Johnny Carson, an introvert, was a great converser because he balanced talking and listening.  He asked great questions of TV guests and listened intently.

For those who would like to talk less and ask/listen more,

Rudyard Kipling's memorable rhyme provides good counsel:

"I keep six honest serving men,they taught me all I knew.

their names are What and Why and When and How

and Where and Who."  --Rudyard Kipling

(For a great resource for question skills, see below.)