I just put my dd to bed. She's 8 months and I've never had a problem with her going to sleep. I've always kept toys out of her crib that way she knows that when I lay her down it's time for sleep. 9 times out of 10 she falls right to sleep after I lay her down.
Tonight I layed her down and after a minute or two she started crying. I didn't think too much about it (especially since it wasn't one of those frantic cries,) just thought maybe she was overly tired and was having a lil trouble falling straight to sleep. So I waited for about 2-3 minutes, and since she was still crying, decided to go and check on her.
When I walked in, she had completely wrapped herself in her blanket and was having trouble getting her head out. She was OK, just a bit frightened. I regret waiting that long to check on her....I can imagine how much worst I'd feel had I completely tuned her out and let her cry herself to sleep.