Start by simply putting your baby to your breast and see what happens. If the baby has been on a bottle or is reluctant for suck for another reason, you will need to stimulate milk production with a pump. In fact, you may want to consider using a double pump, pumping each breast simultaneously. You also may need a supplemental feeder, such as one with a small bottle and tubing that positions the bottle nipple next to your own. This measure helps encourage the baby to suck and helps ensure sufficient milk intake at each feeding.
Mothers attempting to relactate have a few sources of information and help.
Shocker recommends first going back to the maternity or post-natal professionals at the hospital where you delivered. Many hospitals today have certified lactation consultants on staff. They also have the specialized experience of assisting women in this situation. Maintains a directory of certified lactation consultants. The San Diego County Breastfeeding Coalition provides some information to new mothers about two supplements that can sometimes help in milk production.