Here are two good quotes about coaching from this Jon Gruden article:
“He had a good demeanor about him, the way he got his point across. He always told me it was always about your demeanor and how you get your point across. He said, ‘You have to be a car salesman.’ If you want to sell plays, you can’t be short on energy. People want to be associated with people that have a lot of energy and love what they do and show enthusiasm, not someone who just walks in there and kind of goes through the motions.”
“I always tell people,‘You’ve gotta have a why.’ If you have a reason why, you’re most likely going to succeed. ... And those are the types of things as a coach, when you know those things, those are the buttons you can push. When you’re not hustling, when you’re not doing those things, it’s like, ‘Is that the type of example you’re trying to set for your little brothers?’ When you don’t know those things, you can’t use those things.”