What's the secret, Christian?

It's amazing. I woke up at 6:30 this morning and then realized that I hadn't been up once with Christian! After he woke up last night at 10:30, I fed him and put him back to bed. He couldn't keep his eyes open! Right after I woke up this morning, I heard him crying and by the time I got into his room, he was just laying there wide awake and happy! What is the secret? How can I get him to sleep the ENTIRE night, every night???