The result: The first night, Sasha cried more than her son, who whined for 25 minutes, and then fell asleep. "I couldn't believe it!" she says, adding that the next night he was asleep in 15 minutes—and put himself back to sleep when he woke up. By 7 months old, he was sleeping about 11 to 12 hours a night. "He goes down pretty easily, and if he wakes, he generally doesn't cry," says Sasha.