You will be a role model for your youth, this means you must be a good one.

• Live by a higher standard. It may be legal for you to drink alcohol, for example, but is that the kind of example you want to give? They will take it as “all right” and ignore the legal or health issues.
  
• Think about what values you want to promote, then try to live by these values.
  
• Sometimes you will fail to be a good role model, so be a good role model in that failure.
• Admitting you are wrong works wonders.
• Explicitly point out when your behavior has been less than what you expect of them and you.
• Ask them to help you in an area of weakness (“Don't let me eat another doughnut!”).