Another thing that can be helpful is to find the READ copy of the speech—or the large-text, double spaced version of the draft that the secretary’s office prepared for him to read from at the event—after the speech has concluded and take note of any changes, additions, or notes the speaker made on that copy.
Read the greatest speeches of history to see their structure, form, the way delivery is set up, and to see what strategies have stood the test of time.
But it’s also important not to force a square peg through a round hole! No two speakers are the same, and some methods that work with one speaker may fall flat with another.
The way language is used in speech may not always sound 100% natural if you are strictly adhering to grammatical rules. Speeches must sound good to the ear, so feel free to break the rules of grammar to better create the harmony of the spoken word, in a way that you might not with an OpEd or written product.