Any competitive Judo player knows the importance of having the right level of "arousal" when they compete. You dont want to be "overly aroused" to the point where you are too aggresive, and therefore are not thinking strategically. On the other hand, you dont want to be "under aroused" to the point that you have no spirit, no will to win.
The secret is finding the middle...and each training session, competition will be different. Some times you will need to tone down your arousal levels, and other times you will need to pick them up.
Music is a great way of helping you achieve this. Its always good to have a playlist that has a combination of songs, so you can choose something appropriate for how you are feeling.
You will find a good selection on You tube which gives you a start for your playlist. Check out this link for
