The purpose of this study is to evaluate the relative efficacy of a postpartum smoking relapse prevention program, Strategies to Avoid Returning to Smoking (STARTS), and a supportive, nondirective comparison condition (SUPPORT) to increase the proportion of women who remain abstinent through 12 months postpartum. We hypothesize that women randomized to STARTS will maintain higher rates of smoking abstinence at 6 and 12 months postpartum, and expect STARTS to increase the length of time abstinence is sustained relative to SUPPORT.