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How to avoid being talkative
Evaluate the causes for your talkativeness.
You may love to talk about yourself, and not even realize that it's bothering people. You may have a nervous need to fill silence because it feels awkward for you.
You may feel the need to talk because you're jittery and feel like you've got to let out what you want to say. Be aware of what may be the causes for your talkativeness.