"Make sure you tell them about your seedy underworld connections. Let your child know they're worth more to you dead than alive, and keep your statements vague but somewhat descriptive, such as 'you know, just your kidneys alone could help pay off the mortgage' or 'keep this up and you'll be some Saudi prince's bitch by Tuesday.' Make references to pop culture, maybe even movies they've seen without your permission, such as Hostel. Or drive them through a bad neighborhood, and tell them how bad kids sometimes end up fighting pitbulls."
According to the related videos, some of the methods are :
1. Ignoring your kid when they have a problem with something.
2. Taking away personal items for a few hours.
3. Reading fuckloads of parenting manuals.
4. Kickboxing.