The key to success in any parenting is consistency.  If you can maintain consistency in your approach over a set period of time (which the length of that time often is directly correlated to how strong willed your child or teen may be), you communicate that you are not moving and thus they begin to move in the ways they need to.  In fact, children crave this consistency as it provides an anchor for them in their lives.  They can always count on you to have a certain response to an...