Clarity and diction are important too. Some people worry about their accents when they are due to be interviewed. These days, this is not a problem, since all types of accent are now common on both radio and TV. However, you do need to be aware of any local dialect words that may confuse a wider audience. Allow me to quote my late pal, Kenny Harris, who used to tell of the unusual way that certain Scottish folk sometimes respond. "If you ask a Glaswegian a question, and he says 'Aye, right', he means 'No'" said Kenny. "They're probably the only people who can put two positives together to make a negative". All over the world, there are words and phrases that can puzzle your audience. As ever, the best advice is to keep it simple.
Using pauses is one of the most effective ways to improve communication. Not only does it help you to gather your thoughts, but it also helps your audience to digest and understand what you have said. It can be very difficult to get used to using pauses, since we all have set speaking patterns. It is well worth the effort, though. You can practice pausing by counting silently to five at the end of each phrase or sentence. The first time you try, it will seem like a lifetime, but persist until you are used to it. You will find it much easier to do if you talk to someone else, as they will be able to give you the feedback that it sounds just fine.
One of the best ways keep your audience alert is to change the pitch of your voice. We have all heard speakers who deliver in a monotone, causing most of their audience to doze off. You should aim at raising and lowering the pitch of your voice occasionally to maintain interest. Overall, try to lower your voice more than raising it, since this is easier on the ear of your listeners.
Rehearse out loud, and discover what works for you.