Never enter a battle unless you are prepared to see it through
One of the most important ideas when dealing with our kids is that consistency is key. Children need to know that they can trust their parents. All the time. They need to trust they will be loved and cared for. They also need to know that they can count on the fact that what a parent tells them is true. This seems like a very simple thing but when you really think about it, it can be complicated. As much as possible, try to follow through on the things you tell your child. This means that if you promise them a book time, you do your very best to spend that time with them. It also means that, if you set a consequence, you must follow through on that as well. Trust comes from your child knowing that they can count on what you say.
So, be thoughtful about the consequences you decide on for noncompliance or misbehavior. Be sure that you can follow through and that you are willing to stay the course.