okay so i'm not a parent but here are somethings i think parents shouldn't do:
for starters, don't take 7 somas and then forget your 9 year old went to school that day. so because you forget, you call your neighbor and ask if your child is at their house before school gets out.
secondly, don't abuse your kids and then blame your substance/alcohol abuse for it. when you kick your wife and her kids out, then bring them back and tell them to stop living in the past because they seem to dwell on all the shitty things you did/said to them... think twice about what you say to the oldest child because this one has a sharp tongue and dosen't take your bullshit excuses.
these are my thoughts for now, but i'll keep you posted.