Until when is it okay to nurse my baby to sleep?

According to this article (http://kellymom.com/bf/normal/comfortnursing/), it is considered a developmental milestone in which your baby will naturally learn to fall asleep on his/her own (without you teaching them) when they are physically, developmentally and emotionally ready. However, if you wish to teach your baby to fall asleep without nursing, you can consider one of the three methods suggested by this article: http://www.easybabylife.com/how-to-stop-nursing-baby-to-sleep.html As with all things related to babies growing up, enjoy the process while you still can. Before you know it, your baby will be all independent and behaving like a big boy/girl.