The absolute bottom line in coaching is organization and preparing for practice.
Nothing is more effective than sincere, accurate praise.
I often think about the class differences involved in "jobs" vs. "careers."
Everybody isn't everybody.
Many people erroneously think they have only one chance to succeed, and if they miss that chance, they are doomed to failure. In fact, most people have several opportunities to succeed.
"Extra effort," in whatever form it takes (mental, physical, emotional), cannot be sustained without eventual damage and diminishing returns. There has to be a very acute awareness on your part as to the level of exertion and the toll it's taking on those you lead.