If I've had an exceptionally bad day with my kids I actually go back in late at night for a cuddle, and sometimes they wake and we have chatters and I explain how I felt I wasn't as attentive or I was a bit grumpy or whatever and that I'm going to try and make tomorrow a better day (another words apologise). Its good for a few reasons, I'm a paranoid neurotic and if I do this I can sleep. It also teaches my children I am not infallible and it teaches my children that I do take responsibility for my actions, and it also teaches them to do the same. Numerous times DD will come to and do the same and we snuggle and have chatters.