So, just how soon should you expect to establish healthy sleep habits for your baby? Early on, "don’t be surprised when you can’t get them to sleep at night, or for any extended period of time," says Dr. Claudia Nelson, a pediatrician at Aspen Medical Care in Colorado. Her advice? Feed newborn babies on-demand and let them sleep whenever until they’re about a month old. After that time, make sure to keep babies in bright rooms during the day and also get them out of the house for a bit so they can start to understand what waking hours look like as opposed to nighttime.