When I first entered the industry, Master established three rules: 1. Don't look back, 2. Don't call out names, 3. Don't touch your eyes.
Don't look back: Send someone away. If he looks back, take him away.
Don't call by your name: Don't call by your full name. If you do, I'll pester you.
Don't touch the eyes: Don't touch the eyes of a dead person. The resentment is sealed inside. If it breaks, I will ask you to pay for it with your life. "
I didn't know it back then, but each of these three rules would save my life in the future.