Using pauses is a good strategy that helps successful people speak slower, which is a great skill, however, it's effective in its own right.
Work on creatively using pauses to give more impact to your speaking.
For example, if you have an opening for a public presentation that's eight sentences long and you make a significant point after sentence three, throw in a sizable seconds-long pause.
It will add more weight to whatever your last sentence was and give you audience time to soak it in.
It also gives you a chance to collect your thoughts and prepare for the next section of your speech, adding to the total amount of authority and confidence you project.
- Jayson Demers (modified by Amr Badran)