Just like working out at a gym, your facial and oral muscles need to be exercised to function well. Singers and performers warm up by singing scales. Public speakers need to do the same for their articulation.
Here is today's tip:
Warm up before your public speaking engagement with these vocal exercises for the lips, tongue, and jaw.
Lip trills: Say brrrrr. with your lips. It's the sound you make when you're cold. If you do it correctly, your lips will vibrate.
Lip and tongue coordination. Say puh tuh kuh, puh tuh kuh, puh tuh kuh in rapid fire succession.
Lip coordination: Place a pencil between your teeth and say this tongue twister-"Rubber Baby Buggy Bumpers". It causes you to over articulate which will improve your clarity.
Jaw: Place the top of your hand under your chin. Drop your jaw as low as it can go. With your hand in place, say Yaw, Yaw, Yaw.
Do this daily or at least right before your next presentation. You'll feel more relaxed and you'll articulate more clearly and fluently.