We explore practical strategies like sagas for transaction coordination, patterns for analytical data management, and techniques for balancing reuse with autonomy. Along the way, the book’s Sysops Squad Saga provides a running, real-world narrative for applying these ideas, while tools like Architectural Decision Records (ADRs) and fitness functions help teams document and automate architectural governance. Whether you’re an aspiring architect or a seasoned one facing thorny system challenges, this episode offers a roadmap for making better, more informed decisions.