Be silent.
静かにしよう。
When your mind gets noisy—it’s often inevitable—you never get a good idea.
Each one of us needs to learn how to quiet our mind, no matter how old we are now, because it will benefit us for the rest of our lives. That will help us avoid making impulsive (and most of the time, stupid) decisions in our lives. That will helps us distinguish what we can change from what we cannot change.
Try to have a silent mind whenever possible. Don’t get upset easily—that’s a monkey in our mind.