How can we transform our Misery into Enlightenment?

Misery is an emotion that has been created by events or event that has not happened the way we wanted it to happen. Like the girl in the question above you, she feels deep sadness because she wanted something to happen and now it hasn't she feels miserable. The only answer to your question is to allow what has happened to happen, it rains on the day of the planned pick nick, you fail your exams, the saying NO to the events is what causes the misery. When you learn to say yes to what is then you shine the light of consciousness on the present, that which we could call enlightenment perhaps.