Keep your thoughts targeted on the task at hand. If your task is planning, then plan. If your task is building, then build. Don’t argue with people not in the room. And, don’t solve problems that don’t exist anywhere but in your mind. By solving problems in your mind, you must first create them in your mind, then your mind might really create them. It’s better to just focus on real work in the here and now.
Judges aren’t allowed to speculate how they might rule on cases not yet before the court. Follow the same rule: Judge the present.