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Step 1
Practice reading or speaking aloud. Speak slowly and loudly and over-enunciate each word. Do it in front of a mirror and watch how your mouth moves when you speak clearly. Remember to open your mouth in the same way when you're speaking in public.
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Step 2
Think about what you're going to say before you say it. Rehearsing in your head will keep you from stumbling over words once you start to speak.
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Step 3
Improve your vocabulary. Look up words that you have difficulty pronouncing and learn to say them properly.
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Step 4
Take singing or voice lessons from a coach who'll identify your speech problems and help improve them. If mumbling is really pronounced, find a speech therapist who'll give you exercises to improve your enunciation.
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Step 5
Look for speech exercises online. Do speech warm-ups for few minutes each day. Open your mouth as wide as possible. Say a prolonged "ah" sound, going up and down the scale. Practice tongue twisters.
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Step 6
Join Toastmasters or a similar speaking club. They help people improve public speaking skills through techniques and presentations.










