Even if you are intimately familiar with the material, write your remarks out in full or at least prepare a detailed outline. There are two reasons for doing this. First, it helps you organize what you want to communicate. Second, it allows you to make sure that you cover all of your key messages. Invert the pyramid.
People absorb information very differently when they hear it than when they read the same material.
As you write the text, always start each point with the conclusion. Then you can add the supporting information. This allows your listeners to know where you are taking them as you provide the details. Use word pictures. They can be a colorful expression, a colloquialism that fits or even a clich .