Just discipline, correct, and misdirect out of love and you'll be alright. Most importantly, kids want to feel loved. Often times as guys, we end up playing "the heavy" role and I can't say that's ever worked for me or left me feeling good afterwards. Make sure you and your wife try to stay consistent with correction. Otherwise, kids quickly learn that one of you are pushovers and will take advantage. They're testing boundaries just like the velociraptors looking for weaknesses in the fence in Jurassic Park. I love that reference. Anyway, I feel for you because it's tough. I have a daughter and a step-son. Any type of discipline with my daughter always left me feeling terrible afterwards. You have to make peace with it because you're the child's father...not their friend. You're responsible for the child's safety, boundary setting, manners, values, lessons....etc.