Article continues below advertisementSally Field is looking back on the early struggles of her Hollywood career - and giving Jack Nicholson major credit for helping turn things around.In a recent interview, the Norma Rae actress reflected on the difficult years after starring in three seasons of the sitcom The Flying Nun, admitting the industry didn't exactly see her as a serious actress at the time. Determined to prove herself, Field focused on sharpening her craft - and that decision eventually led to Nicholson stepping in and helping change the course of her career.