First things first: Get comfortable.
Sit down and place a firm pillow on your lap; you can use a pillow designed specifically for nursing or a regular pillow.
Lay your baby on his side, with the front of his body facing you; his head, shoulders and hips should be in a straight line and his mouth should be level with, and directly in front of, your nipple. If he is too low, stack another pillow on your lap. You want the baby to come to your breast, rather than leaning over to bring your breast to him.