Mat Ryer discusses his evolved approach to writing HTTP services in Go, building on insights from his previous popular blog post and years of experience with the Go Time podcast and community interactions. He emphasizes structuring servers and handlers for maintainability, optimizing startup and shutdown processes, and handling common request tasks effectively. The article details changes in his methodology, such as avoiding surprise dependencies by passing them as arguments and embracing type safety through longer argument lists. Ryer highlights the importance of properly testing services, using a simple main function to enhance code readability and maintainability, and optimizing for testability by calling the run function during tests. He also discusses the use of middleware, design patterns like the adapter pattern, and the sync.Once pattern to defer setup, stressing the value of designing for testability and end-to-end testing. Throughout, he shares examples and insights from his work at Grafana Labs, underscoring the utility of these practices in both small and large projects.