S.P.
I used to sit by the side of my sons bed and wait till he fell asleep. He liked this. After a while it hardly took anytime for him to get to sleep at all. Next thing you know, he didn't need me to sit there anylonger. Of course, while you sit there, you cannot talk to him, or let him get up or talk or anything. Tell him to lay down, rub or pat his back. Put on some soothing music. Read a book to him. Encourage his resting. Make sure you have a certain time each evening where you will put him to bed, kids need to have a schedule.