Thank you for your email. This is such a good question.
Personally I do not like the "D" (discipline) word. If a child's need for love, attention, consistency and predictability, patience, and motivation are met, he is generally happy and successful and discipline becomes an obsolete concept.
Please read my article 'Positive Parenting' on my website which explains what children need and how these needs can be met. it has just been updated.
Research indicates that traditional disciplinary measures such as smacking, time-out, threatening, withholding privileges and other punitive forms of controlling children are unsuccessful as they have to repeated over and over and on the rare occasion that they do work in changing a child's behaviour it is because the child is fearful rather than motivated to change his behaviour and it is not long lasting creating anger and resentment.
Good luck in meeting your child's needs and let me know if I can be of further assistance.
Best wishes