If you're like me and you want to be able to cut the financial umbilical cord with your kids, start when they're young. Help them procure a part time job -- even if it's just one shift a week at first. Have them open their own bank account, and teach them how to balance their account.
Comment on all of their Facebook posts. Make sure some of them include telling them to come home at a reasonable hour (if it's a picture from a party), or that you really like their "outfit", or "Don't forget to pick up your rash medication on the way home."