Interrupting the speaker, for whatever reason.
Looking everywhere but at the person speaking.
Making the speaker feel as though he or she is being rushed or is a bother.
Trying to finish the thoughts of or suggest words for the speaker.
Drilling the speaker with questions about every little detail.
Choosing to not respond when called upon.
Trying to dominate the conversation or top the speaker's story.
Drawing, doodling, pen-tapping, or fidgeting.
Maintaining a blank expression as if you are not actually listening.
Bringing up unrelated topics or stories.
Repeatedly looking at your watch or the clock to see how much longer you have to go before you can stop listening.
Snapping chewing gum or unwrapping candy or food, which makes irritating noises when people are trying to listen.
Answering the cell phone or text messaging.
Faking an expression of paying attention.
Not paying attention to body language, so that the listener may be displaying a closed body language or even one that makes the person appear angry or hostile.
Just not being polite to the speaker and those listening.