Building modern apps in Golang requires effective instrumentation to quickly identify issues and improve observability. Unlike interpreted languages, Go relies on manual instrumentation due to its compiled nature, which means developers need to manually add New Relic methods to their source code. To get started, developers should learn why they need to instrument their app, start with minimal viable instrumentation (MVI), plan ahead by exposing key identifiers such as request identifier, state identifier, environment identifier, and parameters identifier, and embed observability practices into their development cycle. By following these tips and using the New Relic Go agent, developers can improve their application's visibility and gain confidence in its inner workings.