DS is 20 months old and has always been great about sleeping in his crib. These days, he won't sleep anywhere else!

In the last week, he has figured out how to get out of his sleep sack and escape is crib. We went and bought a toddler rail last night but haven't put it on the bed yet. He slept fine last night with no escapes. He got out this morning. I've been fighting with him for the last hour and a half to take a nap. He keeps getting out!!

So, I'll probably be putting the toddler rail up before bed tonight. If you've made the switch, how do you get your LO to stay in the bed? Help please!!!!

ETA: Do you shut the door all the way? We don't have a video monitor and I'm worried about doing this. I'd like to be able to check on him without having to open the door (it sticks).