"Please Be Responsible for the Energy you bring into this place" - Oprah Winfrey (Free Printable). I saw this on Oprah's life class, and I've been practicing it ever since! Good lesson for my young adult patients as well.
Always tell the truth; use kind words. Keep your promises. Giggle and laugh. Be positive; Always be grateful; forgiveness is mandatory. Try new things, say please and thank you. Say your prayers and smile.
May your character preach more loudly than you words. Who you are and your values have the ability to influence others and the world. Actions speak louder than words so therefore who you are speaks louder than what you have to say.