more grip on your subject content which you are dealing

prepare perfect lecture plan before you deliver the lecture

effective communication skills making the audience active all the time while you are delivering the speech

don't straight away jump into the topic, first ask some questions related to your topic

good introduction to your topic by relating with examples

good eye contact with all the audience

no monotonous tone while delivering the speech

summarize your important points when you are going to finish your lecture

ask the questions in between the lecture and also finally at the end