Poor communication can lead to misunderstandings, little or no progress towards achieving goals, ineffective teamwork and many more negative consequences.  Many people believe they are good communicators but the reality is that we can all become complacent and succumb to bad habits.  

Excellent communicators are self-aware and have a certain level of humility; they seek feedback and know how important it is to appreciate the other person's time, build a personal connection and practice 'active listening' - genuinely listening to the other person before deciding how to respond, not just waiting for their turn to speak!   

You should also be on the look out for non verbal cues...as these often reveal what someone is feeling about what you are saying.    Crossed arms?  They may be feeling defensive.  Wandering eyes?  Perhaps they're bored.