Breast feeding. Make sure baby is positioned right, latching correctly. If the baby still refuses to feed make sure that your nipples are not inverted as it may require a nipple shield. Some infants are tongue-tied and have difficulty latching and sucking. It is poosible that your baby's temperament is such that he/she refuses to be too closely held and needs to be calm before latching on.
Be patient. With newborns, both mom and baby are embarking on a learning experience. Moms are learning how to nurse , and the baby is trying to figure things out as well. If the babyis a "reluctant nurser" try latching sessions of about 5 minutes, if you or the baby become frustrated, stop and offer your baby expressed breast milk. A lactation consultant will offer you great support. Don´t give up!