Describe your approach to AWS cost optimization for a startup.

Cost optimization strategy: 1) Use Reserved Instances for predictable workloads, 2) Implement Spot Instances for fault-tolerant workloads, 3) Right-size instances based on utilization, 4) Use S3 Intelligent Tiering, 5) Implement lifecycle policies, 6) Monitor with Cost Explorer and set up billing alerts, 7) Use serverless services to reduce operational overhead.