I'll start. I was taking my daughter to school really early this morning, and I noticed that she'd packed clothes in her bag by simply stuffing them in, completely crumpled. I pulled them all out, smoothed them and folded them neatly, but couldn't help 'getting' at her about it in the car. I called her lazy, when I know that FMRI scans say that when we nag and tell our teens what we don't like their emotional brain fires up whilst their pre-frontal cortext (thinking/planning part) shuts down. Thankfully, it was a long journey and I managed to talk a bit more to her and apologise for using the L word, asking her more about why she took that decision and explaining why I feel like it isn't the easiest route and she needs to practice skills that will set her up for life.
I guess I'm trying to say that even with all the knowledge in the world we can find it really hard to keep calm and say the right things, but that we can always go back in by apologising and explaining so the both sides feel heard. It's tough.