Engineers often start with Terraform's CLI for managing infrastructure locally, but as projects scale, transitioning to a shared CI/CD pipeline becomes crucial for collaboration, security, and efficiency. This comprehensive guide outlines best practices for managing Terraform workflows in CI/CD environments, emphasizing version control, project structuring, and configuration management for different environments. It highlights the importance of secret management, advocating for the use of centralized secret managers to avoid security risks. The guide also covers state management, advocating for remote state storage and state locking to prevent concurrency issues and data exposure. It stresses the importance of enforcing code quality through formatting, linting, and validation, and discusses the need for governance and compliance through tools like Open Policy Agent. By preparing the build environment in advance and using shared plugin caches, teams can optimize performance and consistency. The guide also touches on the use of approval gates for sensitive operations and advises leveraging Terraform not only for infrastructure but also for managing CI/CD pipelines, ultimately encouraging teams to adapt practices that align with their unique needs and project requirements.