Introduce & explain. Say who you are and what you're about to do, every visit. "I'm going to help you wash up now — is that okay?"
Listen more than you talk. Ask open questions ("How did last night go?"), then really listen. Reflect back what you heard.
Be honest and kind. Don't make promises you can't keep. If you don't know, say "I'll ask the nurse."
Stay calm in conflict. If a family member is upset, lower your voice, don't argue, acknowledge feelings, and loop in the agency if needed.