Always keep good general knowledge & use commonsense. Be active. Read newspapers, extra curricular books so you will have the knowledge about what's happening around your world. Be confident while communicating. Use proper & correct language. Always make eye contact with the person you are communicating. Also use proper gestures.
Read Newspapers and focus mainly in the conversation between taht of a journalist and teh intervieweee. that will help u a lot.
Bye. Hope I Helped.
Reading books , watch news channel
I suggest you that you should have to follow whatever you speak your daily routine always using English language .
You can do it if you are confident