When preparing yourself and case for court, of course you must prepare and follow the courts etiquettes but I have found the most important thing to have in order is documentation. Good, well detailed documentation at that. It helps you keep people, times, places, and events in order. This is a must when testifying because you will have to recall certain events and tell specifics about the situation, this information is essential to the judge when making their decision on the case. Good Documentation also validates your testimony and is considered reliable evidence.
I also think the way that you answer your questions is very important whining preparing yourself for a case. Answering all questions truthfully and to the best of your ability is key, sometimes we tend to fill in the blanks with things we assume about a situation, but I do not think would be a good idea in court. Mainly because you will be under oath, it is ok to say “I don’t know” or “I don’t remember”. Making eye contact and speaking loudly and clearly is also a good idea, it shows you are confident in what you are speaking about.
Lastly, you appearance is very central factor in preparing for a court testimony. Your appearance and dress is the first thing a person sees, so you want to make a good impression. You want to look professional, dressy but not to flashy or distracting. Casual dress can be seen as disrespectful to the court room.