The tips begin at a different place in each module. The advice moves along with the stages of the course.
Try your best to take your practice exams with test day conditions, all in one day, with the regulation breaks, but don't postpone practice tests while you wait for the perfect day to open up. And don't postpone a practice test to spend another day studying. You have a lot of plates spinning and there's always one wobbling. Test anxiety can lead to negative reinforcement of avoidance behavior. It's okay to take a practice test one section at a time. It's okay to miss a few questions. That's better than waiting another week if it's time to get full length practice going.