Persuade them by everything you do and say that what you say are the most important words they will hear. Treat the judge as the first among equals. Never assume the judge knows anything. If you can't do it sincerely, don't do it. Little children and juries, recognize, appreciate and reward sincerity.
Juries punish insincerity.
Watch other trial lawyers perform. Study their successes and failures. Take as your own whatever you can wear comfortably and naturally. But remember everything takes practice and few things feel comfortable or natural the first time you try them on. A trial lawyer is not a good follower.