Keep your word to yourself.
My mom used to say, "If you can't be true to yourself, you can't be true to anyone." Maybe that's why I still feel guilty when I don't keep my word to myself. I think we all do. If you make a promise to yourself, don't you want to honor it? There are lots of aspects of our lives we don't have control over, but we do have control over ourselves. That's one thing you can own.