There are numerous tips throughout that you can apply to the courtroom.  One of the easiest tips to use will help you eliminate clutter in your writing.  He recommends eliminating as many adverbs from your writing as possible.  There's no need to say, "He cruelly said..."  or "She happily said..."  Let the dialogue tell the story.  Let your readers (jurors) glean the story from the dialogue and the surrounding actions.  Don't tell them what they should think - let them reach their own conclusion as to what the characters (witnesses/parties) were thinking or feeling.  To apply this tip to the courtroom, start by re-reading your opening statement draft.  When you encounter adverbs, pull out your red marker and strike the offending words from the page.  You'll tighten your language and tell more compelling stories.