Improving Diction: Getting Your Message Across - the First Time

There are many causes for poor diction, such as speaking too fast, lack of self-confidence in certain situations, weakness or in-coordination of your mouth's muscles, to a hearing loss.
(If you don't hear clearly, you may not know you are not saying certain sounds.)

One tip you can try to improve your diction is to actually listen to yourself speak.
Record your speech when reading aloud, when talking to a friend, or even when describing your surroundings to yourself. Are there certain sounds you are not saying clearly? Do you speak too fast? Ask your friends or colleagues for advice about when you speak less clearly. If your diction has worsened significantly recently, check with your physician; it may be a sign of a neurological problem. For other speech impairments, you may want to have a speech evaluation from a speech pathologist.

General exercises to improve diction can be found in the e-book "Diction Makes A Difference". Intensive reading practice combined with audio files can be found in
"Learn to pronounce American English more clearly." Both can be gotten from http://businessspeechimprovement.com/enabler3/scripts/category.pl?EBooks.

Business Speech Improvement provides training in verbal communication skills.
Coaching and e-books from a corporate speech pathologist are available on many topics, including diction, accent modification, public speaking, executive communication, profession-specific communication and more!