Being a parent is the most difficult job there is. Parenting will be a lot easier if parents will be able to understand these three simple concepts:
Limitations are not about just rules; these make up established boundaries. Setting effective limits will require you to determine what is most valuable. You are not expected to establish rules but you have to create behavioral limits.
Once the limitations have been violated, you have to impose disciplinary actions. This is what discipline is for. Keep in mind the discipline does not necessarily mean punishment.
Keep in mind the children need freedom too. They also need be given the chance to create their own choices and they also need space so they could have time to grow.