Get rid of full-length mirrors.
They send the message that kids should fuss over their outfit (and hair and makeup) before leaving the house. When the mirror's not available, kids learn that looks aren't the most important thing about a person.

Ban conversations about how people look.
Simply don't allow your children to judge others by their appearance. It will force them to move the conversation to the person's other qualities.

Ban racy posters.
Airbrushed posters of swimsuit models and pop stars make it seem like all women should be a size 0 with a large chest. If you do allow kids to put the posters up, at least tell them (often) that the images are digitally altered, so what they're looking at is not a "real" woman.

Don't allow fad diets.
Kids' bodies develop all the way through their teen years, so diet plans that limit certain foods, such as carbohydrates, could affect healthy growth. Make sure they eat a balanced diet, which include whole grains, lean meats and plenty of fruits and vegetables.