Improving your speaking voice

[James Boston]

For diction and articulation, have him go home every night and read something like the front page of the newspaper with a wine cork between his front teeth. That kind of forces people to use their lips properly.

As others of said, projection is more about breathing properly, and that usually results from nerves. It's always awkward when has to pause in the middle of a phrase (when there shouldn't be a pause) because they're out of breath. Slowing down will help alot with this.