AWS architects can enhance the resiliency, reliability, and availability of their cloud applications by following the AWS Shared Responsibility Model and the Reliability Pillar of the AWS Well-Architected Framework. This involves understanding the distinctions between availability, resiliency, and reliability, and aligning architecture designs accordingly. Key strategies include leveraging AWS's scalability and autoscaling capabilities, incorporating redundancy and multiple availability zones, and using automation for change management and monitoring. Emphasizing distributed and microservice architectures over monolithic ones, architects should map out dependencies, aim for loosely-coupled systems, and ensure idempotent operations to improve system resilience. Regular resilience testing, including fault injection, is crucial for identifying and addressing potential failure points, thereby verifying that systems respond as designed. Online resources and platforms like Gremlin offer tools to help identify hidden risks and automate reliability management, supporting the implementation of these best practices in AWS environments.