Remember that your child is an adult.
The parenting techniques you used when your child was a child aren’t any good. You can’t take away privileges, send them to their room or say “because I said so.” Your child is an adult, so treat them like one. If your child comes to you for advice, help them think through their options and their impending consequences. Focus more on the decision-making process than the actual decisions themselves.
Don’t enable them.
When you attempt to protect your child from the consequences of their bad behavior, they don’t learn from those consequences and are less likely to change. If your child is unemployed and living at home, make them get a job and start contributing to the household–financially or otherwise. If your child racks up thousands of dollars in credit card debt, don’t make payments for them.
However, you can help them put together a resume and apply for jobs, or help them establish a monthly budget and credit card payment plan. When you enable your child, you’re not doing anyone any good.