初心 (sho-shin) "Beginner’s mind"
Approach every task as if you were doing it for the first time.
"Sho-shin" is the zen attitude that by looking at every task with the eyes of a beginner, you can keep your mind sharp and open.
When engaging in something in which we consider ourselves an expert, there is the danger of becoming bored, jaded and cynical.
However, if we approach even mundane tasks from a position of playfulness and humble naivety we can rediscover our spark of interest, and perhaps think of new and creative ways to live.
This concept was popularised outside of Japan by the famous Zen priest Shunryū Suzuki's 1970 book Zen Mind, Beginner's Mind.