Well I grew up with a very abusive almost sadist home, I am actually lucky to be alive. (not an overstatement) My brother just recently died because of complications of his earlier childhood abuse (he was 36) Before I had children, I knew I had to learn different way of parenting because what I was modeled was quite the opposite of good parenting.

So i read books up the wazoo! Talked to people, etc. , but yes I stopped the cycle of abuse before I had kids. It wasn't always easy because sometimes when your kids are getting the best of you, it is hard to not fall into those roles that have been modeled all your life, but somehow I did.
I guess if anything I am a little overprotective of my kids, but children know they are loved everyday because I tell them and show them. They know no other way.
Since I have gone back to college, I have taken lifespan development that really teaches you the age stages of children and what they are mentally capable of .
But I guess the best parenting tip I would say is to be consistent with them. If you say you are going to do this, if they don't do that, you better follow through.
But I guess to answer the question, some of us who have come through an abusive home, has learned to be good parents. But I haven't had the background of self harm or addiction though.