Sleep, what's that?

Tommy had his 2 month checkup yesterday and everything "looks good" as Dr. Matt our pediatrician would say. We mainly talked about the sleep situation (only having one bedroom for the kids and getting Tommy to go to sleep before 10 p.m.). My first question was, how do you get a 2 month old to go to bed at a decent time? Dr. Matt's response was, they will do it...when their parents teach them how. He suggested we put Tommy down at 7 and if he cries, let him cry for 5 min and then intervene. Then repeat the process every 5 min until he is asleep. As for only having one room for the kids, he said to put Kassie down later and she will eventually get used to it and be fine. I left feeling hopeful and determined about putting him in with Kassie.
Well, the first night of putting the doctor's advice into action wasn't so bad, both were asleep around 9:30 p.m. The second night, I had to put Tommy in the bassinet. Kassie just would not go to sleep and kept waking up the baby! It was after 10 when she finally gave up.
Tonight I'm still going to give it a try. However, I do have a few things I'll do differently. First, no nap for Kassie which I hate to do because around 5 o'clock she won't be so pleasant! Second, try and keep Tommy awake in the evening. We'll see how it goes. The doctor made it sound so easy!!