You're a faculty member always busy with research, students, services, conferences, travel etc. One of your students (or postdocs) asks to provide a reference letter (for graduate study, postdoc, employment etc.) and mail or e-mail it to the provided address by a certain date. You'd have to move things around in order to find a time for writing a letter. Due to your busy schedule (or poor organizational skills), you tend to postpone it for later times. And then..Oops! You've missed the deadline or even forgotten doing it! How do you react? Do you think that it's not the only opportunity for your student/postdoc and more interesting opportunities will come, and hence it's not a big deal? Or, you realize that because of you the student/postdoc will not be able to compete or even considered for a position, and thus you feel guilty? And what if it happens more than once? Also, when you receive a request for such a letter directly from the institution, do you react differently and treat it with more respect?