Don't hurt anyone it only takes a few seconds to hurt people you love. And it can take years to heal
Be careful with your words. Once they're said, they can only be forgiven, not forgotten.
A tongue has no bone but it can break a heart so be careful with your words. Mean what you say, and say what you mean.
Be true to yourself and to your feelings. Those are the only things in your life that will never lie to you.