Argo CD, a tool for implementing GitOps, requires careful adherence to best practices to avoid common pitfalls, such as misusing the target revision field for promotions and improperly structuring repositories. It's important to distribute applications across different Kubernetes clusters and use application sets to manage configurations effectively. Leveraging Helm hierarchies and understanding deletion and finalizers can enhance deployment strategies, while previewing and diffing deployments can aid in managing changes. Proper installation, upgrade processes, and managing application dependencies are crucial, as is using Argo CD alongside tools like Kustomize for tasks such as ConfigMap rollouts. Earning a GitOps certification can help build skills and credibility in this domain.