For me the hardest time to do this is when I am feeling the deadline pressure for an assignment more than D is. As an adult (and one who does not have any executive functioning issues, which she does), sometimes I can SEE that she is on a path for a late assignment. So I know sometimes that walking away may result in a late assignment if she can't keep moving on it, when she doesn't seem to recognize that probability. That is when I have trouble executing this approach... but I have learned that an argument/power struggle does not usually result in the assignment getting done any sooner anyway. So I try to stick to it (and, of course, encourage her to get started on things sooner). I find that reminding her that she is going to be late when she starts to melt down is NOT helpful, it just adds to the pressure on her. So I try to refrain...