Accept No Excuses!
While visiting a teacher's classroom, I heard her telling students that their work was due electronically by 7:30 the next morning. She told them that she would not accept late work for any reason, so they better not leave things to the last minute, lest their Internet connection crash or some other disaster strike. I asked her later what she would do if she received a corrupted document. In that case, she told me, she would allow the student to fix the issue and resubmit the assignment. Seems fair, right?