National Stepfamily Resource Center. This information is provided by faculty at Auburn University who provide practical ideas based on current research and practice. Many different resources including a free online training for stepparents, lists of local support groups and many things to read.
Smart Stepfamilies, a site managed by Ron Deal, a family therapist who is also on the National Stepfamily Resource Center Board of Directors. This material has a Christian perspective, however, Deal also blends research evidence and best clinical practice into his advice. Videos, groups, daily podcasts, books and many other helpful resources for stepfamilies.