This document summarizes a seminar on customer insights and behavior trends in Indonesia presented by Iwan Setiawan. The seminar covered 9 trends in customer behavior in Indonesia, including how deals help justify unnecessary consumption and how faster product adoption leads to shorter lifecycles. It also discussed two classic tests that show customers can be irrational - the Stanford Marshmallow Test and the Penn and Teller Bottled Water Test. Additionally, it reviewed how to use customer insight tools including qualitative research approaches and sampling techniques. Three case studies of companies innovating based on customer insights in Indonesia were also presented.