I....thought of many, many days...but I realize, in a way, they all tie back to one.
I would relive one day when I was seven years old. My parent had been drinking heavily, and was ill in the morning. This was when I first noticed that it had happened before, and that it was probably going to happen again. I would sit them down, despite being a child, and lay down the simple facts: Stop now. Don't try and bullshit tolerance, or moderation, because you are all or nothing, and you know it. If you do not stop right now, I'm going to lose all faith in you and have serious problems trusting anyone else for decades. Your youngest son, my little brother, will not look at you or say 'I love you' for all of five years, and afterwards he obviously wont mean it when he does. He and I will find our own ways to cope, but become very distant and hardly see eachother as relatives. You'll stress out, gain weight, break this family and cause me to lash out in many different ways throughout my adolescence. So I will say it now - This never happens again. I don't mean don't get caught, but I mean if I ever see you with another drop, or hear of one of your late night drives, or see your 'other side' come out...I'm going to take my little brother, and we are going to go live with our aunt and uncle. It doesn't matter if you bring us back, because we'll just leave again. I will NOT let you do this to us, to everyone, to yourself, and be silent about it. Not this time. So think about what really matters to you.
30 seconds of courage can change one's life, I think.