The following is a postscript to this afternoon's post:
I just put Petunia down for the night. Here is how it went: I nursed her. I burped her. She fussed a bit, so I walked with her for less than a minute. Then I wrapped her in a blanket, put her hat on her, turned on the wave sounds we use as white noise, and put her down in her co-sleeper. She fussed a bit, so I picked her up and walked for another 30 seconds or so. Then I kissed her forehead, put her down, and left the room. I could hear her on the baby monitor, shuffling about for maybe a minute.
I snuck back in to check on her, because I still can't believe it is this easy. She is fast asleep.
At this age (6 weeks old), Pumpkin's bedtime routine was: I nursed her. I burped her. Someone bounced/rocked her for at least 15 minutes. We carefully laid her down, and then sat with a hand on her tummy for another 5 minutes or so until we thought she was sound asleep. If we missed any step, she would usually wake up and scream at us. We knew that we wanted her to go down "sleepy but awake" but could never make that work, and I was beginning to think that advice was a cruel trick being played on parents.