At the minute my baby (13 weeks) falls asleep on me during the day, normally during a feed. If I then try to move her off my lap and onto the sofa, sometimes she wakes up and if she does, won't go back to sleep. (Or if someone interesting is over, she refuses to sleep for fear of missing anything!)
This results in an overtired baby who will cry for ages and after half an hour or so of rocking etc will finally fall asleep on my lap again, by which time I daren't move her.
She naps for around half an hour each time but I would love to know how to start putting her to sleep in her cot as I'm scared one day she will roll of the sofa!