Firms in the midst of digital transformation risk stalling. To overcome organizational inertia, successful firms must scale and operationalize best practices they've so far developed in pockets like mobile app development. Digital business leaders must drive the shift from ad hoc work to adopting and optimizing repeatable practices like design thinking, Agile, and more. Forrester interviewed 36 digital leaders to understand how to operationalize early transformation efforts. Here is what we learned.