I've made a lot of mistakes as a parent. I've written about most of them here - they range from tragicomic incidents like accidentally bringing my four-year-old to a verrrrrry adult haunted house and getting my entire family into a The Hills Are Alive situation, to having my head elsewhere when they need it to be right there with them.
Listening. I am so bad at listening.
I've also written over and over about the importance of forgiving yourself. About the fact that we are, all of us, flawed - and yet all of us are, of course, doing the best that we can. We love our children impossibly, and yet we make mistakes - sometimes the same ones, over and over and over. I know that dwelling on these mistakes helps no one. I know that you learn from them; you move on; you try to do better the next time.