I would like other parents opinion please!?

I know that at some point in a child's life they need to learn to fall asleep on their own. I was reading an article done by a child psychologist on how to make the transition easier for the kids and the parents. And what they had on there sounded like good ideas. Im just wondering what other parents have done to help their kids fall asleep by themselves. Also my son is only 3 months, when is a good time to start helping him fall asleep on his own? He sleeps very well now, sleeps through the night most days of the week. It just makes me feel bad when he wakes up in the middle of the night because I'm not standing right there and he knows that so I feel like he gets scared or frustrated. Now I understand that when I do start helping him with this it wont be an overnight thing and that's ok =)