Breathe
Simple but effective. Deep breaths before answering questions. Calms nervous system. Improves clarity.
It's Not Adversarial
Officer isn't trying to trick you or fail you. Most officers want you to pass. They're just verifying information.
Take Your Time
You can ask officer to repeat questions. Take 5 seconds to think before answering. Don't rush.
Be Honest
If you don't know answer: say so. Lying causes bigger problems than admitting gaps in knowledge.