How to sound smart, polished and confident

How to sound smart, polished and confident?

To sound more intelligent
-Speak just a bit slower to allow yourself to select the most appropriate words and to give the impression of thoughtfulness.

To sound more powerful
-Use short, simple declarative sentences.
-Say what you mean and mean what you say.-Cut out any useless connectors, adjectives, adverbs and superlatives.

To sound more polished
-Never answer a question with a blunt "yes" or "no". Append a short phase of clarification.
-For example, "No. i did not see that" or "Yes, I know ..."

To sound more articulate
-make a special effort to pronouce the final sound in a word and use its energy to carry over to the following word. Pay special attention to final "t" and "ng".

To sound more confident
-Carry your body up. Hold your head as if you had a crown on it. Do not let your arms and legs have a side-to-side-motion when you move.Keep your elbows and knees close to the midline of your body.