There's a reason that you check the microphone, testing 1-2-3, testing 1-2-3. It's to make sure everything is working properly and you're ready to go for the live broadcast. Make sure that you check and test before your live broadcast. When you do that, you have less errors, less technical problems and deliver a better message. So learn from the tried and true microphone check, testing 1-2-3. After all, it's the right thing to do and it models the way for others.