Babywise helped give me a roadmap for discipline. Instead of just wandering around the house saying "do this, don't do that, stop, no, please stop, noooo!" I felt confident in teaching my children obedience. Also, Babywise gave some basic parameters that helped me determine what expectations were even appropriate.
The principles of Babywise also helped me realize that while my children have free will, I am the one in charge. I've learned to train and discipline without tyranny or domination, but through the use of consequences and in a healthy mother/child relationship.