Use "I" phrases when offering criticism.
College Athlete Success Evaluation (C.A.S.E.) - Individual Sports
College athletes need both mental and physical agility in order to thrive. Do you have the right mindset? ...Take this Test
"If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month."
Do your best on every task you take on, even if no one will ever see it.