There are no casual commitments. Everything counts. If you say it, make it happen. If you can’t make it happen, don’t say it. Your opinion of your word is the most important opinion. No excuses. No justification. No explanations. If you make a commitment, no matter how small, no matter how large, whether it is made to someone else or just made silently to yourself, keep it. There is a lot of psychological proof and science behind this rule. Yet you don’t really need any of the proof or science to validate the rule.