Visualization about the forthcoming event in advance isn´t bad at all. You want to spend every single minute of your time in the way that you choose to. Practice the routine so that you avoid nervousness since this i wasted adrenaline. If you can eliminate that element, you´ll have more in the tank when it´s time to compete. If there´s a possibillity to scope out the site of the competition a few days beforehand, you have already taken care of some parts that could get you nervous. By being familiar to the site of the competition, the area in general you can take away the edge of the anxiety.
Next article: Progressive Muscle Relaxation