Sleeping baby sign - this is much prettier than the post-it note that I've resorted to using that basically threatens anyone who comes anywhere near my door that they better not even think of ringing or knocking! I even stopped using "please" on my sign.
VERY interesting read. Ways to carry your baby and how it effects your their development. New Moms: read this. Research-based information on the effects of strollers, buggies, papooses and swaddling as well as the benefits of proper baby-wearing.