Well, to be honest, it all depends. If you are a complete novice in public speaking, then attending one of those professionally conducted public speaking training can help you tremendously.
1. The Power Of Listening
Master the skill of listening. Let's admit, most often than not, we only hear what we want to hear. In fact, most of the time we just hear what people are talking, but we do not listen to them.
“The art of conversation lies in listening” — Malcolm Forbes