This document summarizes two presentations from the opticon2017 conference. The first presentation discusses driving deeper engagement to retain subscribers for Showtime and increasing consumption of Showtime programming. It also presents three case studies on personalization techniques that led to increased subscription leads and order clicks. The second presentation discusses the speaker's experience over 24 months optimizing at WSJ, emphasizing the importance of testing, prioritization, and quantifying the value of their work. It also provides examples of low-hanging fruit tests around acquisition and engagement that yielded substantial lift.