5. Keep your baby comfortable

Don't overdress your baby or keep her room too warm while she sleeps. An overheated baby may sleep too deeply to arouse herself if she has trouble breathing. A T-shirt and blanket sleeper, in a room that feels comfortable to an adult, should keep a baby warm enough.

6. Educate your family

Remind family members and caregivers that you expect them to follow these protective measures as well -- and stand your ground when others second-guess you. One study showed that one reason babies are still placed on heir stomachs is because someone else, such as the baby's grandmother, mistakenly believes that it's the best position.

7. Stick to simple

Finally, don't rely on devices, including so-called breathable mattresses, positioning devices and over-the-counter monitors, that suggest they'll prevent SIDS. "These can give a false sense of security, so a parent may be tempted to let a baby sleep on her tummy," says James Kemp, M.D., an as sociate professor of pediatrics at St. Louis University School of Medicine, who's studied some of these new products.