One of the basic prerequisites in child training is the power of communication. Do not create a communication barrier for any reason between you and your child, do not nag about any issue between you and your child, it is expected of you to terminate sarcastic comments which serve only to alienate further. You can go for an occasional face-to-face confrontation rather than indulge in a series of gibes or bursts of heated discussion. More so, praise your child when necessary, though it may be difficult to find anything you can praise in the child. This will build bridges between you and will take some of the wind of bad behaviour out of his soul. Talk normally even if there is no response from him or you feel rejected. Let him know the parameters within which to operate and, outside of which can result to discipline.
More importantly, consistent and unconditional love with prayer of faith will definitely bring down the desired miracles. As a parent you'll need to be available for your children because raising up a child requires quality time. Discipline, prayer and love is indispensable in child training.
Communicate the right words to your child at the right time. Teach them how to talk humbly and not to be lousy in their talk, too much talking is bad; teach them when to talk and when not to talk.
It is good for a child to be able to express his/herself clearly without grumbling, crying or shouting when discussing with his/her parent but this virtue has to be imbibed in the child right from his childhood by their parent.