How to enhance communication skills?

Be Clear On Your Words:
Make sure you understand what you want to say before you start. Explain the context of your point so your listener clearly understands why you’re talking to them. Use simple words and language to express your point.


Do Not Talk Too Fast or Too Slow:
Talking too fast shows your nervousness and the result of this people tend to perceive you as unsure of yourself. Therefore, you need to be slow and steady, while expressing your thoughts to someone. However, being too slow is also not good. Rather, develop a moderate speed for your speech. You can develop this habit by practicing at home. You should read newspapers and check your speed. Also try talking to yourself in front of mirror.


Stays Positive:
Phrase your ideas and suggestions in a positive, rather than critical way. Be confident. Don’t assume that what you have to say isn’t worthwhile. Keep in mind that a listener’s silence doesn’t necessarily mean consent or disapproval. It may just mean that the person needs to think about a response before answering.


Listen Actively:
Make sure you understand what the other person is trying to say. Keep an open mind. Be flexible about compromises and alternate solutions. Make sure you understand someone’s point before you react. Speak with self-control; don’t just say the first response that comes to mind.


Concentrate On Your Pitch:
Use a volume that is appropriate for the setting. Speak more softly when you are alone and close. Speak louder when you are speaking to larger groups or across larger spaces.


Pronounce your words correctly:
People will judge your competency through your vocabulary. If you aren’t sure how to say a word, don’t use it.


Use the right words:
If you’re not sure of the meaning of a word, don’t use it. Start a program of learning a new word a day. Use it sometime in your conversations during the day.


Maintain Eye Contact:
Maintaining eye contact is essential to becoming a good communicator. Whenever you are talking to a person, make eye contact with him. Good eye contact would show the real confidence in you. When you are addressing a group of people, try to glance at each person alternatively. 
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Source: personalitydevelopmentblog.com