Answer:
Write the speech, then read it and revise over and over.
Step-by-step explanation:
Whenever preparing for a speech, the most important thing is to make sure that whatever you want to express or talk about in the speech are included. It need not necessarily be the perfect or full-fledged composition of the speech, but rather mention the main points first.
It is always preferable to write down the speech so that there can be revisions and alterations done before finalizing it. The first draft can be sketchy, even rough, but that's what makes it the first draft. It need not be a complete and correct speech at the first attempt. But more important than that, it is best to write down the speech, read it over and over again, make revisions and then make changes wherever necessary.