You're a busy person, and even though you're very organized, sometimes things slip through the cracks. If you unintentionally stand someone up or forget to call when you said you would, a heartfelt apology is in order - and the sooner after the misstep occurs the better. You put a lot of thought into a date over the weekend, so it's disappointing if you don't get positive feedback. Oh, well. You can't please everyone all the time.