The camera IS your audience. I have always imagined there's a whole bunch of little tiny people in that camera lens to keep my focus on the lens, unless there is an actual audience in the studio room and the TV audience knows that, then I play to the audience.

Everyone in the audience wants to be seen by the performer. Give a little time to each of the 9 points of the audience and you’ll be glad you did. Imagine center and sides of the balcony, the back of the house, and the front of the house.