Learn about radar equipment, if applicable. Your trial date has arrived. First, show up. Failure to appear equals a guilty verdict in most cases. Second, dress to impress and watch your language.
Courts of law are notoriously old-fashioned about attire and behavior.
If you've drawn Hanging Judge Roy Bean, you may want to change your plea. Lastly, use your head. This is not the time to debate the constitution. Still, thinking on your feet may save the day. The defendant had collected none of the data recommended here.