In order to be a successful radio presenter you have to know how to talk, talk a lot and talk well, but you cannot be a person who simply likes to hear the sound of her own voice. Don't talk about what you want to hear, talk about what your listeners will most likely want to hear. If need be, do a quick poll at the top of your show to find out which topic of the day your listeners want to discuss (A, B or C).
Don't drone on, as this will increase the likelihood that your listeners will choose to turn the dial. Learn when to wrap up your point (usually no longer than 1 to 2 minutes) and either move onto the next topic or discuss your next point.
While your voice may be a comfort to your listener, it's always nice to hear an another voice from time to time in conversation. This is why many radio presenters have "sidekicks" or talk to the producer of the show on the air. Bring in respected experts, commentators and guests to break up the monotony of your own voice being heard over the radio.
Get opinions from your audience to make your radio presentation more interesting. State your initial points regarding the topic, then accept two or three calls at a time. Provide your insight in relation to the comments of the callers and then repeat the process between commercial breaks. Stick with this format so that your listeners will know what to expect.
When you add differing points of view in your radio presentation, they can fuel the controversy and excitement that drives a successful radio show.
Some radio presenters make the mistake of taking a clear side in an argument. This can slice your listenership in half (or more) as this tends to cause listeners from the other side of the argument to switch the dial. Your listeners need to know that you are a balanced radio presenter who respects and acknowledges all views.