At 7 weeks now, our baby has developed two consistent things. First, he always wakes up at 6:10 AM. No matter when he went to bed or when he had his last feeding. 6:10 AM. The other consistency is a rather strange one... if he sleeps for more than 5 hours in the first chunk of the night, he will sleep terribly for the rest of it. If he sleeps less than 5 hours in the first chunk, the rest of the night will be smooth. I have no idea why this makes sense. So now it's crazy how we've now begun hoping for only 4 hours of sleep! He seems more likely to sleep only 4 hours if he goes down earlier, so we try for as early as possible. (This is doubly good since he wakes up at the same time each day!)
I'm really hoping we can develop a bit more of a routine before I go back to work... less than a month, now. Here's hoping!