"Admit when you're wrong. Shut up when you're right." -John Gottman (This man knows a LOT about what helps - and what hurts - relationships. He's done tons of research on it, read his stuff it's amazing.
My mom & dad tried & tried to teach me this as I was a young girl. Today now I am almost a 40 year old woman I see so clearly the importance of having good people around you full of integrity for themselves & others.