Obviously anytime a lab coat is contaminated, all bets are off, and that coat should be changed regardless of where you are. For more on lab coat standards and information, click here. Also, check out the Tools section for a free Bloodborne Pathogens PPE Compliance Checklist.
Self-worth is important to recognize because it helps us have a better self-esteem. We must know the value of ourselves before we gain the confidence to demonstrate our own value to others. Recognizing our self-worth allows us to believe in ourselves and not let the failures in life and the opinions of others define us.
Our minds and bodies are not separate entities as we like to think sometimes, but they are instead the same thing. Good self-care (moving your body, eating well, sleeping enough, and avoiding harmful things) is a life long task that is a key to mental health. If this stuff sounds good to you, I think the main way to start using it is to first assess where you are at with each component.