Let your tone, pacing,rhythm and volume match your content. If you are telling the audience about being in the desert at night and you want to say "it was so quiet", make your voice almost a whisper on the word "quiet" and slow the pacing down, so you give the sense of the experience.
Singers: The voice is sensitive and delicate, and (like an automobile), needs a maintenance tune-up from time to time. The throat needs moisture, and always needs water. To keep the throat moist this week, trying drinking one glass of pineapple juice per day.
