I had to do a few things to get my boy to sleep:
1. Take out all of the toys and book in his room. I had to turn my dining room into a playroom so that his room only contains his bed and his clothes. At one point, I even had to take out the clothes to keep him from pretending his shoe was a car.
2. A baby gate on the door is a requirement. Otherwise, he will scare the crap out of me creeping around.
3. When he starts screaming and fussing, IGNORE him. After a few hours, he'll eventually pass out.
4. I do have a night light, but no hall lights or anything else. Don't want him to have too much light to entertain himself.