Secure software development won't succeed without substantial collaboration among the infosec teams in an organization. In this session, I describe and discuss various established secure software practices and why involvement of infosec staff is so vital to their success. Citing numerous examples of case studies, I spotlight myriad successes and failures encountered in both small and very large software development organizations. Additionally, for each software security practice, I provide an actionable list of things a software development team should start doing to immediately improve its results through collaboration with (generally in-house) infosec staff.