Listening, the most important aspect of communication, can be improved by

Listening improves most when the contents are made interesting and need-based for the listener.

Relevant, engaging content holds attention and gives the listener a reason to attend.

Linking listening to a monetary reward is extrinsic and does not build genuine listening skill.

Enhancing the speaker's voice aids delivery but shifts focus to the speaker, not the listener's skill.

Punishing inattentive listeners breeds fear and resistance rather than better listening.

Active listening, involving attention, understanding and feedback, is the standard goal here.